US2748541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Edge grinding optical lenses
Assignee: Individual
•
Filing: 1953-02-05
•
Granted: 1956-06-05
•
Expires: 1973-02-05
Abstract
No abstract record available.
Inventors
- 👤 Connell Wade Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
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)
US475068A
Cited
US508196A
Cited
GB191515680A
Cited
US1452917A
Cited
US1659964A
Cited
US2414126A
Cited
US2653427A
Cited
US2618106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |