Patent US3429073A successfully refreshed from Google Patents.
US3429073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact door operator
Assignee: Otis Elevator Co
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Filing: 1966-10-27
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Granted: 1969-02-25
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Benjamin Whitehead Tucker Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:47
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/085; H02H7/0851; E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/649; E05F15/40; E05F15/41; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/51
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |