Patent US3068540A successfully refreshed from Google Patents.
US3068540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet metal screw fastener
Assignee: Bishop and Babcock Corp
•
Filing: 1959-12-18
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Granted: 1962-12-18
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Expires: 1979-12-18
Abstract
No abstract record available.
Inventors
- 👤 Leonard S Jaworski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:38
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/12; F16B5/123; F16B5/125; Y; Y10; Y10T; Y10T24/00; Y10T24/30; Y10T24/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US775812A
Cited
US1110495A
Cited
US1506465A
Cited
US2000241A
Cited
US2329744A
Cited
US2564638A
Cited
US2618824A
Cited
US2560961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |