Patent US2981898A successfully refreshed from Google Patents.
US2981898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic timer
Assignee: Individual
•
Filing: 1957-03-18
•
Granted: 1961-04-25
•
Expires: 1977-03-18
Abstract
No abstract record available.
Inventors
- 👤 John Dale E St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30; H03K17/00; H03K17/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2787707A
Cited
US2846580A
Cited
US2810080A
Cited
US2850648A
Cited
US2841712A
Cited
US2877399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |