Patent US3205625A successfully refreshed from Google Patents.
US3205625A
Expired / Lapsed
US
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Grinding of contact lenses
Assignee: Corneal Lens Corp Pty Ltd
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Filing: 1963-01-30
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Granted: 1965-09-14
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Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas Penrhyn Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:41
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/06; B24B13/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A METHOD OF MANUFACTURING FROM A BLANK, A CONCAVO-CONVEX CONTACT LENS FITTING THE CORNEA OF A USER, SAID LENS HAVING A CENTRAL OPTIC AND A LIMBAL BAND, THE STEPS OF ROTATING SAID BLANK ABOUT A FIXED AXIS, GRINDING THE SIDE OF SAID ROTATING BLANK WHICH WILL FORM THE CONCAVE SIDE OF SAID LENS TO FORM AT LEAST SAID LIMBAL BAND, GRINDING SAID ROTATING BLANK OUTSIDE OF THE LIMBAL BAND TO FORM THE PERIPHERY OF SAID LENS, AND GRINDING A PORTION OF THE SIDE OF SAID ROTATING BLANK WHICH WILL FORM THE CONVEX
Claim 2
Dependent Claim
93 words
IN A METHOD OF MANUFACTURING FROM A BLANK, A CONCAVO-CONVEX CONTACT LENS FITTING THE CORNEA OF A USER, SAID LENS HAVING A CENTRAL OPTIC AND A LIMBAL BAND, THE STEPS OF ROTATING SAID BLANK ABOUT A FIXED AXIS, GRINDING THE SIDE OF SAID ROTATING BLANK WHICH WILL FORM THE CONCAVE SIDE OF SAID LENS TO FORM AT LEAST SAID LIMBAL BAND, GRINDING SAID ROTATING BLANK OUTSIDE OF THE LIMBAL BAND TO FORM THE PERIPHERY OF SAID LENS, AND GRINDING A PORTION OF THE SIDE OF SAID ROTATING BLANK WHICH WILL FORM THE CONVEX
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |