US3037331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens grinding device
Assignee: Individual
•
Filing: 1959-11-23
•
Granted: 1962-06-05
•
Expires: 1979-11-23
Abstract
No abstract record available.
Inventors
- 👤 James C Dipprey
- 👤 Jesse J Sandifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:46
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US970674A
Cited
US2247706A
Cited
US2383501A
Cited
US2715803A
Cited
US2754638A
Cited
US2822647A
Cited
US2880556A
Cited
US2916857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |