US3100955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing contact lenses
Assignee: W-J (DELAWARE) Inc
•
Filing: 1960-04-25
•
Granted: 1963-08-20
•
Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 Henry J Kratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/0025; Y; Y10; Y10T; Y10T82/00; Y10T82/14; Y10T82/148
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
APPARATUS FOR PRODUCING CONTACT LENSES COMPRISING A LENS BLANK HOLDING TOOL HAVING A ROTOR THAT HAS THE EDGE OF ITS END ROUNDED TO CONTACT A SPHERICAL BASE CURVE OF A LENS BLANK WITH A TRUE CIRCLE OF CONTACT, AN ORIENTING ELEMENT AXIALLY MOVABLE RELATIVE TO SAID ROTOR AND HAVING MEANS NORMAL TO THE AXIS THEREOF TO ENGAGE ONE SURFACE OF AN ORIENTING FLANGE OF THE LENS BLANK, SAID ROTOR END AND SAID MEANS COOPERATING TO HOLD THE LENS BLANK AXIS TRUE TO THE AXIS OF ROTATION OF SAID ROTOR WHILE A SPHERICAL POWER CURVE IS FORMED ON SAID BLANK OPPOSITE SAID BASE CURVE.
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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) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |