Patent US3011291A successfully refreshed from Google Patents.
US3011291A
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US
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Edge grinding machine for lenses
Assignee: Textron Inc
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Filing: 1957-06-10
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Granted: 1961-12-05
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Expires: 1977-06-10
Abstract
No abstract record available.
Inventors
- 👤 Walton John Robert
- 👤 Robert E Allen
- 👤 William J Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:35
CPC Classifications
B; B24; B24B; B24B9/00; B24B9/02; B24B9/06; B24B9/08; B24B9/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2693063A
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US2674068A
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US2685153A
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US2749671A
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US2725689A
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US2651890A
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US2871627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |