US3360889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for altering the power of a corneal contact lens
Assignee: Indiana Contact Lens Inc
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Filing: 1965-10-11
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Granted: 1968-01-02
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Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 Irvin M Borish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:19
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00932; B24; B24B; B24B13/00; B24B13/0025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
THE METHOD OF ALTERING THE POWER OF A PLASTIC CORNEAL LENS OF PART SPHERICAL SHAPE, SAID LENS HAVING FRONT AND REAR SURFACES AND A PERIMETRAL EDGE PORTION, SAID FRONT SURFACE BEING A PART OF THE LENS THAT DETERMINES THE LENS POWER, COMPRISING THE STEPS OF PERFORMING A ROTARY POLISHING ACTION ON A PREDETERMINED AREA OF THE FRONT SURFACE OF SAID LENS, SAID AREA BEING CURVED AND SAID POLISHING ACTION BEING APPLIED WITH A FORCE WHICH IS A MAXIMUM IN A GIVEN VICINITY WITHIN SAID AREA AND PROGRESSIVELY DECREASES OUTWARDLY THEREFROM, APPLYING SAID FORCE BY MEANS OF A RESILIENTLY DEFORMABLE MEMBER HAVING A POLISHING SURFACE AGAINST WHICH SAID AREA IS IMPRESSED, AND TERMINATING SAID POLISHING ACTION AFTER A PREDETERMINED CHANGE IN THE POWER OF SAID LENS HAS BEEN EFFECTED.
References Cited (Backward Citations)
US1626026A
Cited
US2644277A
Cited
US3037425A
Cited
US3031927A
Cited
US3032936A
Cited
US2990664A
Cited
US3077707A
Cited
US3111790A
Cited
US3112581A
Cited
US3205625A
Cited
US3145506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |