US3468401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw-driven elevator
Assignee: LETZ AUFZUG Ets
•
Filing: 1966-12-05
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Granted: 1969-09-23
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Expires: 1986-12-05
Abstract
No abstract record available.
Inventors
- 👤 Emile Guillaume Joseph Letz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
B; B66; B66B; B66B9/00; B66B9/02; B66B9/025; F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H2025/2062; F16H2025/2096; F16H25/24; F16H25/2472; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18656
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US789003A
Cited
US2004060A
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US2187390A
Cited
US2527897A
Cited
US3215227A
Cited
US3308674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |