Patent US2975565A successfully refreshed from Google Patents.
US2975565A
Expired / Lapsed
US
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Machine for grinding and polishing lenses
Assignee: Individual
•
Filing: 1957-10-29
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Granted: 1961-03-21
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Expires: 1977-10-29
Abstract
No abstract record available.
Inventors
- 👤 Edward H Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:28
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/04; B24B13/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1461094A
Cited
US2406789A
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US2278314A
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US2291000A
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US2381449A
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US2392478A
Cited
US2747339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |