US3022500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trigonometric converter
Assignee: General Precision Inc
•
Filing: 1958-01-13
•
Granted: 1962-02-20
•
Expires: 1978-01-13
Abstract
No abstract record available.
Inventors
- 👤 Wesley E Stupar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:47
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2436178A
Cited
GB650913A
Cited
US2747797A
Cited
US2822130A
Cited
US2792545A
Cited
US2766445A
Cited
US2866184A
Cited
US2750584A
Cited
US2779539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |