Patent US2931019A successfully refreshed from Google Patents.
US2931019A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1957-08-01
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Granted: 1960-03-29
•
Expires: 1977-08-01
Abstract
No abstract record available.
Inventors
- 👤 Henry G Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:30
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/15; Y; Y10; Y10T; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191112225A
Cited
US2566697A
Cited
US2704803A
Cited
US2768234A
Cited
US2759177A
Cited
US2728823A
Cited
US2826652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |