US3436937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key safe
Assignee: IRAL D BARRETT
•
Filing: 1967-05-02
•
Granted: 1969-04-08
•
Expires: 1987-05-02
Abstract
No abstract record available.
Inventors
- 👤 Iral D Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:14
CPC Classifications
E; E05; E05B; E05B19/00; E05B19/0005; Y; Y10; Y10T; Y10T70/00; Y10T70/40; Y10T70/50; Y10T70/5009; Y10T70/5031
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1920116A
Cited
US1955809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |