Patent US2931216A successfully refreshed from Google Patents.
US2931216A
Expired / Lapsed
US
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System of testing gas meters
Assignee: Individual
•
Filing: 1955-10-24
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Granted: 1960-04-05
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Expires: 1975-10-24
Abstract
No abstract record available.
Inventors
- 👤 Adolph W Rauth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:45
CPC Classifications
G; G01; G01F; G01F25/00; G01F25/10; G01F25/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1615572A
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US1747439A
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US1880562A
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US2309117A
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US2448616A
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US2510327A
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US2561904A
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US2707390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |