US2579364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator mechanism
Assignee: Individual
•
Filing: 1948-05-24
•
Granted: 1951-12-18
•
Expires: 1968-05-24
Abstract
No abstract record available.
Inventors
- 👤 Robert F Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:51
CPC Classifications
A; A01; A01D; A01D87/00; A01D87/12; A01D87/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US930719A
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US2432956A
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US2404629A
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US2460441A
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US2477389A
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US2418575A
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US2427324A
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US2400086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |