US3411640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
De-stacking device for sheet metal blanks
Assignee: Livernois Engineering Co
•
Filing: 1966-03-08
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Granted: 1968-11-19
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Expires: 1986-03-08
Abstract
No abstract record available.
Inventors
- 👤 Bernard J Wallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:49
CPC Classifications
B; B65; B65G; B65G59/00; B65G59/02; B65G59/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1750391A
Cited
US2074815A
Cited
US2382405A
Cited
GB788037A
Cited
US3330554A
Cited
US3322301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |