US2860327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1956-04-27
•
Granted: 1958-11-11
•
Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Charles A Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:19
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/02; H03M7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2691100A
Cited
US2719670A
Cited
US2671171A
Cited
US2697549A
Cited
US2690303A
Cited
US2762915A
Cited
US2770415A
Cited
US2756934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |