US3029520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating device
Assignee: Individual
•
Filing: 1956-12-18
•
Granted: 1962-04-17
•
Expires: 1976-12-18
Abstract
No abstract record available.
Inventors
- 👤 Donald A Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:36
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1391731A
Cited
US2098838A
Cited
US2115955A
Cited
US2242151A
Cited
US2267583A
Cited
GB605692A
Cited
US2483743A
Cited
US2576142A
Cited
US2849799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |