US3109696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making plastic lenses
Assignee: American Optical Corp
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Filing: 1962-05-15
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Granted: 1963-11-05
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Expires: 1982-05-15
Abstract
No abstract record available.
Inventors
- 👤 Donald B Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:35
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00932; B29D11/00942; B29D11/00009; B29D11/00028; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49861
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
THE METHOD OF CASTING PLASTIC LENSES HAVING AT LEAST A READING AND A DISTANCE FIELD COMPRISING MOUNTING A FIRST DISK OF RELATIVELY RIGID MATERIAL ONTO A HOLDER, DIVIDING SAID DISK INTO TWO SECTIONS, GRINDING AND POLISHING A PRETERDINED FIRST SURFACE ON THE EXPOSED SIDE OF SAID DIVIDED DISK AND TO THE CURVATURE DESIRED OF THE READING FIELD OF THE LENS, MOUNTING A SECOND DISK OF RIGID MATERIAL
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |