US2603973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible chamber pressure gauge
Assignee: US Filter Wallace and Tiernan Inc
•
Filing: 1947-03-15
•
Granted: 1952-07-22
•
Expires: 1967-03-15
Abstract
No abstract record available.
Inventors
- 👤 Charles F Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:03
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/10; G01L7/104; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/7722; Y10T137/7837; Y10T137/7838
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189911485A
Cited
US1001810A
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US1340399A
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US1935736A
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US1937565A
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US2178799A
Cited
US2345464A
Cited
US2306038A
Cited
US2365573A
Cited
US2311900A
Cited
US2455200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |