Patent US3399313A successfully refreshed from Google Patents.
US3399313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoparametric amplifier diode
Assignee: Unisys Corp
•
Filing: 1965-04-07
•
Granted: 1968-08-27
•
Expires: 1985-04-07
Abstract
No abstract record available.
Inventors
- 👤 David E Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:42
CPC Classifications
H; H03; H03F; H03F7/00; H10; H10D; H10D99/00; H10F; H10F99/00; H03F2200/00; H03F2200/372
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2986591A
Cited
US3043959A
Cited
US3192398A
Cited
US3196327A
Cited
US3229106A
Cited
US3170067A
Cited
US3265899A
Cited
US3245002A
Cited
US3267294A
Cited
US3283160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |