US3438669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamp mechanism for a lifting implement
Assignee: INVENTORS ENGR Inc
•
Filing: 1967-01-16
•
Granted: 1969-04-15
•
Expires: 1987-01-16
Abstract
No abstract record available.
Inventors
- 👤 Albam M Vik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/184
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1807360A
Cited
US2497778A
Cited
GB671332A
Cited
US2842275A
Cited
US3194345A
Cited
US3172693A
Cited
US3319815A
Cited
US3263516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |