US3146943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Birth control indicator
Assignee: Individual
•
Filing: 1963-01-04
•
Granted: 1964-09-01
•
Expires: 1983-01-04
Abstract
No abstract record available.
Inventors
- 👤 Tsuji Isamu
- 👤 Ikeuchi Toshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:05
CPC Classifications
G; G06; G06G; G06G1/00; G06G1/02; G06G1/04; A; A61; A61B; A61B17/00; A61B17/42; G06C; G06C3/00; G06G1/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |