US3469253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data conversion system
Assignee: Singer General Precision Inc
•
Filing: 1964-05-25
•
Granted: 1969-09-23
•
Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 John M Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:44
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/68; H03M1/662; H03M1/82; H03M1/822
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2888647A
Cited
US2954165A
Cited
US2907021A
Cited
US3012240A
Cited
US3177472A
Cited
US3313922A
Cited
US3267429A
Cited
US3292173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |