Patent US3300909A successfully refreshed from Google Patents.
US3300909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing contact lens
Assignee: Individual
•
Filing: 1963-08-19
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Granted: 1967-01-31
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Expires: 1983-08-19
Abstract
No abstract record available.
Inventors
- 👤 Cooper Melvin Dwight
- 👤 John C Gorman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:41
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/0025; Y; Y10; Y10T; Y10T82/00; Y10T82/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF PRODUCING A BIFOCAL CONTACT LENS WHICH COMPRISES THE STEPS OF CUTTING AND POLISHING A FIRST SURFACE ON SAID LENS, DISPOSING A COVERING COMPOUND PARTIALLY OVER SAID CUT AND POLISHED FIRST SURFACE, CUTTING AND POLISHING A SECOND SURFACE ON SAID LENS AND REMOVING ANY COVERING COMPOUND REMAINING AFTER SAID CUTTING AND POLISHING OF SAID SECOND SURFACE.
Claim 2
Independent Claim
58 words
THE METHOD OF PRODUCING A BIFOCAL CONTACT LENS WHICH COMPRISES THE STEPS OF CUTTING AND POLISHING A FIRST SURFACE ON SAID LENS, DISPOSING A COVERING COMPOUND PARTIALLY OVER SAID CUT AND POLISHED FIRST SURFACE, CUTTING AND POLISHING A SECOND SURFACE ON SAID LENS AND REMOVING ANY COVERING COMPOUND REMAINING AFTER SAID CUTTING AND POLISHING OF SAID SECOND SURFACE.
References Cited (Backward Citations)
US3123954A
Cited
US1684431A
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US1871123A
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US2097001A
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US2106981A
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US2237744A
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US2904419A
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US3089763A
Cited
US3064401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |