US2651890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic edge grinding machine for lenses
Assignee: Individual
•
Filing: 1951-12-11
•
Granted: 1953-09-15
•
Expires: 1971-12-11
Abstract
No abstract record available.
Inventors
- 👤 Rubinstein Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:50
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)
US1226329A
Cited
US1365448A
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US1527594A
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US1521116A
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US1657720A
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GB512104A
Cited
US2164155A
Cited
US2321383A
Cited
US2414126A
Cited
FR937109A
Cited
US2528137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |