US3555451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser cold cathode apparatus
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1968-03-28
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Granted: 1971-01-12
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Expires: 1988-03-28
Abstract
Abstract THIS SPECIFICATION DISCLOSES A LASER SYSTEM MADE TRULY PORTABLE BY THE COMBINATION THEREIN OF A COLD CATHODE PROVIDING HIGH, DIRECT CURRENT, ELECTRON FLOW FOR GAS-ION LASER PUMPING REQUIREMENTS. THE CATHODE IN THE EXAMPLE SHOWN MAY BE A PELLET OF INDIUM WHICH IS EXPOSED TO AN ELECTRIC FIELD WHEN EMISSION IS REQUIRED.
Inventors
- 👤 Robert S Witte
- 👤 Charles E Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:51
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0977; H01S3/02; H01S3/03; H01S3/038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |