US2692501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure measuring apparatus
Assignee: VAPOR RECOVERY SYSTEMS CO
•
Filing: 1948-04-14
•
Granted: 1954-10-26
•
Expires: 1968-04-14
Abstract
No abstract record available.
Inventors
- 👤 Erwood John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:15
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1939067A
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DE683976C
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US2213485A
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US2402666A
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GB559149A
Cited
US2361738A
Cited
US2557393A
Cited
US2376156A
Cited
US2407141A
Cited
US2452156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |