Patent US2830620A successfully refreshed from Google Patents.
US2830620A
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Assignee: Texas Tool & Machine Co
•
Filing: 1955-05-09
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Granted: 1958-04-15
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Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 J C Shuptrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:48
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F01D17/145; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/87016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US208986A
Cited
GB189617847A
Cited
US1710006A
Cited
US1705800A
Cited
US1781224A
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US1779266A
Cited
US2006191A
Cited
US2079647A
Cited
US2295611A
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US2413869A
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US2595012A
Cited
US2676781A
Cited
US2694545A
Cited
US2659565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |