US2874569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas meter diaphragm
Assignee: Elster American Meter Co LLC
•
Filing: 1955-04-05
•
Granted: 1959-02-24
•
Expires: 1975-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert B Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:01
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)
US56694A
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US116669A
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US1206365A
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US1583203A
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FR644253A
Cited
US1801896A
Cited
GB676415A
Cited
GB686314A
Cited
US2760260A
Cited
US2798507A
Cited
US2742785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |