US2500443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure indicator
Assignee: Jerguson Gage & Valve Co
•
Filing: 1944-09-27
•
Granted: 1950-03-14
•
Expires: 1964-09-27
Abstract
No abstract record available.
Inventors
- 👤 Lewis B Winton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/162; G04; G04C; G04C3/00; G04C3/02; G04C3/027; G04C3/0273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US92572A
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DE358312C
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US903973A
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GB191312255A
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FR459937A
Cited
US1592415A
Cited
GB266705A
Cited
US1722469A
Cited
US1888424A
Cited
US2286919A
Cited
US2230973A
Cited
US2411508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |