Patent US2858697A successfully refreshed from Google Patents.
US2858697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
entwistle
Assignee: —
•
Filing: —
•
Granted: 1958-11-04
•
Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:34
CPC Classifications
G; G01; G01F; G01F5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
DE332024C
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US1051931A
Cited
US1456621A
Cited
DE468977C
Cited
US2303532A
Cited
US2311238A
Cited
US2370634A
Cited
US2494936A
Cited
US2707879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |