US2779439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic elevator current operated by-pass control
Assignee: Schindler Haughton Elevator Corp
•
Filing: 1955-03-25
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Granted: 1957-01-29
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Expires: 1975-03-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Borden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:54
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/3476
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2624425A
Cited
US2641337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |