US2693701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas meter diaphragm
Assignee: SPRAGUE METER Co
•
Filing: 1949-08-25
•
Granted: 1954-11-09
•
Expires: 1969-08-25
Abstract
No abstract record available.
Inventors
- 👤 Whitworth Fairchild
- 👤 Charles W Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:09
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/20; G01F3/22; G01F3/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR426677A
Cited
FR19731E
Cited
US1149716A
Cited
US1414835A
Cited
US1788754A
Cited
CH136226A
Cited
US1982966A
Cited
US2514388A
Cited
US2544665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |