Patent US3548335A successfully refreshed from Google Patents.
US3548335A
Expired / Lapsed
US
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Brush cathode discharge maser
Assignee: United States Department of the Army
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Filing: 1968-08-08
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Granted: 1970-12-15
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Expires: 1988-08-08
Abstract
No abstract record available.
Inventors
- 👤 Colin S Willett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:10
CPC Classifications
H; H01; H01S; H01S1/00; H01S1/06; H01S3/00; H01S3/02; H01S3/03; H01S3/038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB1017248A
Cited
GB1096298A
Cited
US3464025A
Cited
US3469207A
Cited
US3460053A
Cited
US3427567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |