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US2544997A
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Actuating system for air-brake mechanism
Assignee: Oil Well Supply Co
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Filing: 1949-01-25
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Granted: 1951-03-13
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Expires: 1969-01-25
Abstract
No abstract record available.
Inventors
- 👤 Charles J Keim
- 👤 August R Maier
- 👤 Quayle Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:31
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/28; B; B66; B66D; B66D5/00; B66D5/02; B66D5/24; B66D5/26; E; E21; E21B; E21B19/00; E21B19/008; B66D2700/00; B66D2700/03; B66D2700/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US203071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |