US2738684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating mechanism for high pressure valves
Assignee: MANSFIELD DEV Inc
•
Filing: 1949-10-21
•
Granted: 1956-03-20
•
Expires: 1969-10-21
Abstract
No abstract record available.
Inventors
- 👤 Homer J Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:52
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/50; F16K31/508; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18704; Y10T74/21; Y10T74/219
Claims Analysis
Total Claims: 0
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US2197155A
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US2267524A
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US2383901A
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US2455368A
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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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |