John C Lehman

Author:

John P. Lehman

ISBN #:

0306411717

Author:

John W. Lehman

ISBN #:

0205071465

Author:

John W. Lehman

ISBN #:

0205112552

Author:

John W. Lehman

ISBN #:

0130154954

Author:

John W. Lehman

ISBN #:

0130178675

Author:

John W. Lehman

ISBN #:

0130335185

Author:

John W. Lehman

ISBN #:

0131587161

Author:

John W. Lehman

ISBN #:

0131593811

US Patent:

6630671, Oct 7, 2003

Filed:

May 4, 2001

Appl. No.:

09/849959

Inventors:

John Henry Lehman - Boulder CO
John Andrew Aust - Boulder CO

Assignee:

The United States of America as represented by the Secretary of Commerce - Washington DC

International Classification:

G01J 500

US Classification:

2503383

Abstract:

A pyroelectric detector with significantly reduced microphonic noise sensitivity that includes a pyroelectric detector element constructed from a z-cut LiNbO or LiTaO electret. Selective domain reversal is accomplished in the electret by applying an electric field. Electrodes are attached to either surface of the electret spanning the domain reversed region and a portion of the original domain region to create areas of equal and opposite sensitivity. The detector is mounted in an electrically grounded container or housing. The detector may also be constructed having multiple detector regions to accommodate resonant acoustic frequencies of the electret, to function as a position sensor, or both. In other words, the position sensor has multiple domain regions that also accommodate acoustic frequencies. The detector may also be constructed having domain reversed regions placed on the electret in a periodic pattern having a geometry and spacing that is related to the acoustic impulse response of the electret.

US Patent:

61146986, Sep 5, 2000

Filed:

Jan 30, 1998

Appl. No.:

9/016561

Inventors:

John Henry Lehman - Boulder CO
John Andrew Aust - Boulder CO

Assignee:

The United States of America as represented by the Secretary of Commerce - Washington DC

International Classification:

G01J 510

US Classification:

2503383

Abstract:

A pyroelectric detector with significantly reduced microphonic noise sensvity that includes a pyroelectric detector element constructed from a z-cut LiNbO. sub. 3 and LiTaO. sub. 3 electret. Selective domain reversal is accomplished in the electret by applying an electric field. Electrodes are attached to either surface of the electret spanning the domain reversed region and a portion of the original domain region to create areas of equal and opposite sensitivity. The detector is mounted in an electrically grounded container or housing. The detector may also be constructed having multiple detector regions to accomodate resonant frequencies of the electret or to function as a position sensor.

US Patent:

59040661, May 18, 1999

Filed:

Feb 19, 1997

Appl. No.:

8/802607

Inventors:

John Henry Lehman - Boulder CO

Assignee:

The United States of America as represented by the Secretary of Commerce - Washington DC

International Classification:

F16H25/24

US Classification:

74 8915

Abstract:

A high-precision positioning post having alternating parallel cuts transving the center-line of the shaft body and which are perpendicular to the major axis of the shaft. The shaft further comprises a bearing rod internal to the shaft which is acted on by a screw. As the screw is turned, the bearing rod forces the end of the shaft to axially translate an object without rotation. This allows an object integral to the shaft or mounted on the shaft to be translated and located along the major axis of the shaft without rotation of the object. In an alternate embodiment the present invention may be used to isolate vibration by inclusion of dampers in the hollow shaft. A third embodiment uses the basic design as a vibration isolation mechanism for buildings.

US Patent:

60708506, Jun 6, 2000

Filed:

Jul 24, 1998

Appl. No.:

9/122247

Inventors:

John Henry Lehman - Boulder CO

Assignee:

The United States of America as represented by the Secretary of Commerce - Washington DC

International Classification:

F16M 1300

US Classification:

248622

Abstract:

The present invention is a high-precision positioning post having alternag parallel cuts transversing the center-line of the shaft body and which are perpendicular to the major axis of the shaft. The shaft further comprises a bearing rod internal to the shaft which is acted on by a screw. As the screw is turned, the bearing rod forces the end of the shaft to axially translate an object without rotation. This allows an object integral to the shaft or mounted on the shaft to be translated and located along the major axis of the shaft without rotation of the object. In an alternate embodiment the present invention may be used to isolate vibration by inclusion of dampers in the hollow shaft. A third embodiment uses the basic design as a vibration isolation mechanism for buildings.

US Patent:

54330300, Jul 18, 1995

Filed:

Apr 6, 1994

Appl. No.:

8/223634

Inventors:

John E. Lehman - Dallas TX

International Classification:

A01G 900

US Classification:

47 321

Abstract:

A portable self-supporting greenhouse comprising: a plurality of transparent inflatable tubular rings forming a cylindrical shaped structure, the tubular rings having a first inlet for inflating the transparent tubular rings and interconnecting passageways which allow the transparent rings to be inflated via the first inlet, at least one opaque inflatable tubular ring attached to the transparent inflatable rings forming a base for the structure, the opaque ring having a second inlet for inflating the opaque ring with a dense medium. A transparent cover is provided which comprises a plurality of transparent inflatable radial segments defining an annular top which is in communication with the transparent rings, the annular top having an opening and an inflatable transparent hatch positioned over the opening and removably secured to the annular top. In addition, a doorway and a door are provided in the cylindrical structure, the door comprises a plurality of inflatable tubular ring sections in communication with the transparent tubular rings forming the cylindrical structure. The door has a hinge and a latch to secure the door in a closed position.

US Patent:

20200240957, Jul 30, 2020

Filed:

Jan 28, 2020

Appl. No.:

16/774646

Inventors:

- Gaithersburg MD, US
Christopher Yung - Louisville CO, US
Kimberly Ann Briggman - Boulder CO, US
John Henry Lehman - Boulder CO, US

International Classification:

G01N 29/24
G01N 29/22
C01B 32/158

Abstract:

A photoacoustic photon meter includes: a photoacoustic generative array including carbon nanotubes disposed in a photoacoustic generating pattern, such that the carbon nanotubes: receive photons comprising optical energy, and produce thermal energy from the optical energy; and a superstratum including a thermally expandable elastomer on which the photoacoustic generative array is fixedly disposed in position on the superstratum to spatially conserve the photoacoustic generating pattern, and such that the superstratum: is optically transparent to the photons; receives the thermal energy from the photoacoustic generative array; expands and contracts in response to receipt of the thermal energy; and produces photoacoustic pressure waves in response to the expansion and contraction, the photoacoustic pressure waves including a photoacoustic intensity and photoacoustic frequency that are based upon an amount of optical pressure applied to the carbon nanotubes by the photons, a spatial photon fluence of the photons, or a spectral photon fluence of photons.

US Patent:

20180299299, Oct 18, 2018

Filed:

Jun 12, 2017

Appl. No.:

15/620746

Inventors:

- Gaithersburg MD, US
JOHN LEHMAN - BOULDER CO, US
MICHELLE STEPHENS - BOULDER CO, US
NATHAN TOMLIN - BOULDER CO, US
PAUL WILLIAMS - ERIE CO, US

International Classification:

G01D 5/28

Abstract:

A photon momentum sensor includes: a reflector plate that includes: a central disk including a mirror; an annular member; a plurality of spring legs interposed between the central disk and the annular member, such that: the spring legs are interleaved; neighboring spring legs are spaced apart; and the spring legs individually are arranged in an Archimedean spiral that provides orthogonal motion of the central disk relative to the plane of the annular member; and a bias plate disposed opposing the reflector plate such that: the central disk of the reflector plate moves orthogonally to a plane of the bias plate in response to reflection of laser light, and the central disk and the bias plate are arranged spaced apart as a capacitive structure.

US Patent:

20150140546, May 21, 2015

Filed:

Nov 14, 2014

Appl. No.:

14/542293

Inventors:

- Lakewood CO, US
Darryl HUDOCK - Centennial CO, US
John T. LEHMAN - Corbett OR, US

Assignee:

TERUMO BCT, INC. - Lakewood CO

International Classification:

C12Q 3/00

US Classification:

435 3

Abstract:

Described are embodiments for determining components of a composite liquid and controlling the flow of the components into containers. In one embodiment, components of whole blood, after separation, are determined and directed to different containers for collection and storage. Embodiments may be implemented on an apparatus configured to separate multiple discrete volumes of composite liquid (e.g., whole blood) into components.