US3521875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable handling device
Assignee: GRAND IRON WORKS Inc
•
Filing: 1968-04-29
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Granted: 1970-07-28
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Expires: 1988-04-29
Abstract
No abstract record available.
Inventors
- 👤 Samuel D Kapelsohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:49
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/52; B23Q1/527; B23K; B23K37/00; B23K37/04; B23K37/0426; B23K37/0452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |