Patent US2901935A successfully refreshed from Google Patents.
US2901935A
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Facing heads
Assignee: J & A Keller Machine Co I
•
Filing: 1957-05-10
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Granted: 1959-09-01
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Expires: 1977-05-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur P Keller
- 👤 Irvin C Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:12
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03432; B23B29/03435; B23B29/03439; B23Q; B23Q11/00; B23Q11/0032; B23Q11/0035; B23B2260/00; B23B2260/088; Y; Y10; Y10T; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T82/00; Y10T82/25; Y10T82/2529; Y10T82/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2138722A
Cited
US1181580A
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US2046462A
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US2221638A
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US2521900A
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US2520342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |