Patent US2657595A successfully refreshed from Google Patents.
US2657595A
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Pressure fluid operated tool with pressure fluid control feed
Assignee: KELLER TOOL CO
•
Filing: 1949-08-17
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Granted: 1953-11-03
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Expires: 1969-08-17
Abstract
No abstract record available.
Inventors
- 👤 Ernest H Shaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:52
CPC Classifications
B; B23; B23B; B23B45/00; B23B45/04; Y; Y10; Y10S; Y10S92/00; Y10S92/04; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T408/00; Y10T408/55; Y10T408/564; Y10T408/5647; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |