US2528137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens grinding machine
Assignee: Individual
•
Filing: 1947-10-22
•
Granted: 1950-10-31
•
Expires: 1967-10-22
Abstract
No abstract record available.
Inventors
- 👤 Grasser Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:27
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)
US681396A
Cited
US739264A
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US927949A
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US1051869A
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US1659560A
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US1610638A
Cited
US2175719A
Cited
US2164155A
Cited
US2233312A
Cited
US2321383A
Cited
US2357154A
Cited
US2406606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |