US2652727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring absolute pressure
Assignee: Hays Corp
•
Filing: 1947-09-24
•
Granted: 1953-09-22
•
Expires: 1967-09-24
Abstract
No abstract record available.
Inventors
- 👤 Robert D Richardson
- 👤 George B Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1552321A
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US2251751A
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US2231570A
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US2256395A
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US2307626A
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US2465682A
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US2459268A
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US2388542A
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US2472645A
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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) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |