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US2669324A
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Automatic landing elevator system
Assignee: Westinghouse Electric Corp
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Filing: 1952-06-26
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Granted: 1954-02-16
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Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 Alvin O Lund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:16
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/36; B66B1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2427771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |