Patent US4926437A successfully refreshed from Google Patents.
US4926437A
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Ceramic cathode for ring lasers
Assignee: Individual
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Filing: 1988-12-21
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Granted: 1990-05-15
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Expires: 2008-12-21
Abstract
Abstract Disclosed is a ceramic cathode for a ring laser gyro comprising a ceramic substantially composed of a material selected from the group consisting of silicon carbide, boron carbide, and boron nitride.
Inventors
- 👤 Carol M. Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:51
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; G01C19/661; H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038; H01S3/0388; H01S3/0382; H01S3/05; H01S3/08; H01S3/081; H01S3/083; H01S3/0835
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A laser generator comprising: a body for containing a gas; a electric potential source; a electrode secured to said body and providing a gas tight seal, said electrode being adapted to be electrically connected to the negative side of said source; and wherein said electrode is a monolithic body of a sintered powder of a ceramic material substantially composed of a material selected from the group consisting of boron carbide and boron nitride, and mixtures thereof.
Claim 2
Dependent Claim
76 words
A laser generator comprising: a body for containing a gas; a electric potential source; a electrode secured to said body and providing a gas tight seal, said electrode being adapted to be electrically connected to the negative side of said source; and wherein said electrode is a monolithic body of a sintered powder of a ceramic material substantially composed of a material selected from the group consisting of boron carbide and boron nitride, and mixtures thereof.
Claim 3
Dependent Claim
87 words
A ring laser gyro comprising: a substantially thermally and mechanically stable block having a plurality of interconnected gas containing tunnels forming an optical closed-loop path cavity therein; at least one anode mounted on said block and in communication with said gas; a cathode mounted on said block and in communication with said gas, and said cathode is a monolithic body of a sintered powder of a ceramic material substantially composed of a material selected from the group consisting of boron carbide and boron nitride and mixtures thereof.
Claim 4
Dependent Claim
87 words
A ring laser gyro comprising: a substantially thermally and mechanically stable block having a plurality of interconnected gas containing tunnels forming an optical closed-loop path cavity therein; at least one anode mounted on said block and in communication with said gas; a cathode mounted on said block and in communication with said gas, and said cathode is a monolithic body of a sintered powder of a ceramic material substantially composed of a material selected from the group consisting of boron carbide and boron nitride and mixtures thereof.
Claim 5
Dependent Claim
26 words
The ceramic cathode of claim 2 wherein said ceramic material includes selected amounts of a metallic element for enhancement of secondary electron emission of said cathode.
Claim 6
Dependent Claim
24 words
The ceramic cathode of claim 3 wherein said metallic element is selected from the group consisting of beryllium, platinum, and manganese, and compounds thereof.
Claim 7
Dependent Claim
26 words
The ceramic electrode of claim 1 wherein said ceramic material includes selected amounts of a metallic element for enhancement of secondary electron emission of said cathode.
Claim 8
Dependent Claim
24 words
The ceramic electrode of claim 5 wherein said metallic element is selected from the group consisting of beryllium, platinum, and manganese, and compounds thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |