US3238986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking structure
Assignee: Individual
•
Filing: 1963-07-16
•
Granted: 1966-03-08
•
Expires: 1983-07-16
Abstract
No abstract record available.
Inventors
- 👤 Sr Donald F Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:16
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/30; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/935
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US370168A
Cited
US490585A
Cited
US3127198A
Cited
US731983A
Cited
US1081239A
Cited
US1405342A
Cited
US2318415A
Cited
US2355285A
Cited
US3097728A
Cited
US3074746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |