Patent US2563881A successfully refreshed from Google Patents.
US2563881A
Expired / Lapsed
US
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Tensiometer
Assignee: Individual
•
Filing: 1945-08-17
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Granted: 1951-08-14
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Expires: 1965-08-17
Abstract
No abstract record available.
Inventors
- 👤 Frank M Steadman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:11
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/08; G01N2203/00; G01N2203/02; G01N2203/026; G01N2203/0262; G01N2203/0278; G01N2203/028; G01N2203/0282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US280491A
Cited
GB189413650A
Cited
US2136344A
Cited
AT142515B
Cited
US2196223A
Cited
US2368757A
Cited
US2348098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |