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Patent US2938165A successfully refreshed from Google Patents.
US2938165A
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Method and apparatus for testing meters
Assignee: DTE Energy Co
•
Filing: 1956-03-12
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Granted: 1960-05-24
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Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Walter A Greig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:23
CPC Classifications
G; G01; G01R; G01R35/00; G01R35/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE507269A
Cited
US2241181A
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US2332300A
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US2599378A
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US2586008A
Cited
GB710488A
Cited
US2705303A
Cited
GB724093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |