US2523764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating device for elevator drive mechanisms
Assignee: JOHN W SPEAKER
•
Filing: 1946-07-27
•
Granted: 1950-09-26
•
Expires: 1966-07-27
Abstract
No abstract record available.
Inventors
- 👤 Frederic N Jodry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:04
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0458; F16H57/048; F16H57/0498; F16N; F16N7/00; F16N7/14; F16N7/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US358583A
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US1151732A
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FR616381A
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US2183667A
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US2107219A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |