US868639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for varying the force of counterweights for hoisting skip-cars.
Assignee: BROWN HOISTING MACHINERY Co
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Filing: 1907-02-23
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Granted: 1907-10-22
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Expires: 1927-02-23
Abstract
No abstract record available.
Inventors
- 👤 Alexander E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:27
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/0025; C; C21; C21B; C21B7/00; C21B7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1910-10-21 | 1911-04-22 | 1911-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-10-21 | 1915-04-22 | 1915-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-10-21 | 1919-04-22 | 1919-10-22 | $7700.00 | Window Closed / Lapsed |