US3482906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aspheric corneal contact lens series
Assignee: Individual
•
Filing: 1965-10-04
•
Granted: 1969-12-09
•
Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 David Volk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:48
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C2202/00; G02C2202/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |