Patent US1939067A successfully refreshed from Google Patents.
US1939067A
Expired / Lapsed
US
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Instantaneous pressure recorder
Assignee: Westinghouse Electric Corp
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Filing: 1929-01-05
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Granted: 1933-12-12
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Expires: 1949-01-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Legg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:00
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/06; G01L23/08; G01L23/12; G01L23/125; G01L23/26; G01L23/28; G01L23/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-12-11 | 1937-06-12 | 1937-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-11 | 1941-06-12 | 1941-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-11 | 1945-06-12 | 1945-12-12 | $7700.00 | Window Closed / Lapsed |