US2939984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash device and method
Assignee: Revvity Inc
•
Filing: 1957-11-21
•
Granted: 1960-06-07
•
Expires: 1977-11-21
Abstract
No abstract record available.
Inventors
- 👤 Harold E Edgerton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:17
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/84; H01J61/90; H05; H05B; H05B41/00; H05B41/14; H05B41/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1361710A
Cited
US1961618A
Cited
US2033375A
Cited
US2102190A
Cited
US2654043A
Cited
DE884276C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |