US2792845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidproof control valve
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1953-07-20
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Granted: 1957-05-21
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Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 William C Atherton
- 👤 Newton O Felps
- 👤 Carney B Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:48
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K27/0272; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
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) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |