US3348340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacturing optical lenses
Assignee: Textron Inc
•
Filing: 1964-07-24
•
Granted: 1967-10-24
•
Expires: 1984-07-24
Abstract
No abstract record available.
Inventors
- 👤 Tracy H Calkins
- 👤 Frank E Duckwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:44
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/02; B24B13/023; B24B13/005; B24B13/0052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF MAKING A LENS HAVING A CONCAVE TORIC SURFACE COMPRISING THE STEPS OF PLACING A LENS ON A SUPPORT HAVING THE COUNTERPART CONFIGURATION OF A DESIRED CONCAVE TORIR LENS SURFACE, SUBJECTING SAID LENS TO HEAT SUFFICIENT TO CAUSE SAID LENS TO SAG INTO FITTING CONTACT WITH SAID SUPPORT THEREBY TO FORM THE DESIRED CONCAVE TORIC LENS SURFACE ON ONE SIDE OF SAID LENS, PLACING SAID ONE SIDE OF SAID LENS AGAISNT A GRINDING WHEEL HAVING THE SAME COUNTERPART TORIC CONFIGURATION AS SAID SUPPORTAND ORIENTING SAID LENS SO THAT THE ONE SIDE OF SAID LENS FITS SAID GRINDING WHEEL, AND ROTATING SAID GRINDING WHEEL SO AS TO GRIND THE ONE SIDE OF SAID LENS.
Claim 2
Independent Claim
115 words
A METHOD OF MAKING A LENS HAVING A CONCAVE TORIC SURFACE COMPRISING THE STEPS OF PLACING A LENS ON A SUPPORT HAVING THE COUNTERPART CONFIGURATION OF A DESIRED CONCAVE TORIR LENS SURFACE, SUBJECTING SAID LENS TO HEAT SUFFICIENT TO CAUSE SAID LENS TO SAG INTO FITTING CONTACT WITH SAID SUPPORT THEREBY TO FORM THE DESIRED CONCAVE TORIC LENS SURFACE ON ONE SIDE OF SAID LENS, PLACING SAID ONE SIDE OF SAID LENS AGAISNT A GRINDING WHEEL HAVING THE SAME COUNTERPART TORIC CONFIGURATION AS SAID SUPPORTAND ORIENTING SAID LENS SO THAT THE ONE SIDE OF SAID LENS FITS SAID GRINDING WHEEL, AND ROTATING SAID GRINDING WHEEL SO AS TO GRIND THE ONE SIDE OF SAID LENS.
References Cited (Backward Citations)
US886310A
Cited
US1140421A
Cited
US1287091A
Cited
US1483866A
Cited
US1677382A
Cited
US1643978A
Cited
US1995676A
Cited
US2482698A
Cited
US3012379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |