Patent US1840880A successfully refreshed from Google Patents.
Patent US2972803A successfully refreshed from Google Patents.
US2972803A
Expired / Lapsed
US
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Method of making a light amplifier and storage device
Assignee: GTE Sylvania Inc
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Filing: 1957-07-01
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Granted: 1961-02-28
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Koury Frederic
- 👤 Frederick A Loughridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:48
CPC Classifications
H; H10; H10F; H10F55/00; H10F55/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |