US2808545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure pick-up-differential-type acceleration-free
Assignee: Individual
•
Filing: 1955-01-24
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Granted: 1957-10-01
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Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Walter J Hirtreiter
- 👤 Donald V Kelly
- 👤 Arthur L Pulley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:27
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/02; G01L13/00; G01L13/02; G01L13/025; G01L9/00; G01L9/0041; G01L9/0072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR619826A
Cited
US2004736A
Cited
US2482440A
Cited
US2577435A
Cited
US2500643A
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US2605426A
Cited
US2681415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |