Patent US2528952A successfully refreshed from Google Patents.
US2528952A
Expired / Lapsed
US
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Pressure device for lens grinding machines
Assignee: Individual
•
Filing: 1946-04-06
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Granted: 1950-11-07
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Expires: 1966-04-06
Abstract
No abstract record available.
Inventors
- 👤 Goldberg Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:13
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)
US927949A
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US1048059A
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US1109405A
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US1272474A
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US1449266A
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US1906739A
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US1763201A
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US2175719A
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US2144205A
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US2233312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |