US3239967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens surface generator
Assignee: Individual
•
Filing: 1963-07-02
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Granted: 1966-03-15
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Expires: 1983-07-02
Abstract
No abstract record available.
Inventors
- 👤 Volk David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:45
CPC Classifications
B; B23; B23Q; B23Q27/00; B23Q27/003; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/102; B23Q35/42; B23Q35/44; B24; B24B; B24B13/00; B24B13/06; B24B13/065; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/302968; Y10T409/303248
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF GENERATING AN OPTICALLY USEFUL SURFACE INCLUDING GRINDING AN OPTICALLY USEFUL MATERIAL IN THE PLANE OF THE PRINCIPAL SECTION OF SAID SURFACE AND CONTROLLING SAID GRINDING BY CAUSING THE GRINDING ACTION TO FOLLOW AS A GRINDING PATH A PORTION OF A GENERALLY CIRCULAR PLANAR PATH WHOSE IS INCLINED RELATIVE TO A PLANE PARALLEL TO THE PRINCIPAL SECTION OF SAID SURFACE TO BE GENERATED.
Claim 2
Dependent Claim
122 words
APPARATUS FOR GENERATING ELLIPTICAL CYLINDERS HAVING UTILITY AS OPTICAL LENSES AND MIRRORS, COMPRISING A BASE, MEANS FOR MOUNTING A WORK BLANK HAVING A PRICIPAL SECTION IN A FIXED POSITION ON SAID BASE, A TOOL HAVING A CIRCULARLY CYLINDRICAL MATERIAL REMOVING SURFACE, MEANS MOUNTING SAID TOOL ON SAID BASE FOR ROTATION ABOUT A TOOL AXIS WHICH ALWAYS REMAINS PARALLEL TO ITSELF, MEANS FOR ROTATING SAID TOOL ABOUT ITS AXIS, A SUITABLY INCLINED AND POSITIONED GENERALLY CIRCULAR CAM ON SAID FRAME, A CIRCULARLY CYLINDRICAL CAM FOLLOWER RIGIDLY CONNECTED TO MOVE WITH SAID TOOL AXIS, AND SYMMETRICAL TO THE TOOL AXIS WITH THE SAME RADIUS AS THAT OF THE CIRCULARLY CYLINDRICAL TOOL, AND SAID CAM FOLLOWER MOUNTED FOR ROLLING ALONG THE EDGE OF SAID CAM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |