US3397570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unidirectional meter prover
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1966-06-13
•
Granted: 1968-08-20
•
Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Raymond H Pfrehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:31
CPC Classifications
G; G01; G01F; G01F25/00; G01F25/10; G01F25/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA650762A
Cited
US2948142A
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US2948143A
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US3081472A
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US3224247A
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US3158888A
Cited
US3146477A
Cited
US3232090A
Cited
US3186014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |