Patent US3298772A successfully refreshed from Google Patents.
US3298772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triplet-type magnifying lens
Assignee: Republic Lens Co Inc
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Filing: 1963-08-02
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Granted: 1967-01-17
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Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
- 👤 Milinowski Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:16
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/002; G02B25/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A MAGNIFYING LENS COMPOSED OF A FIRST, A SECOND AND A THIRD LENS MEMBER CEMENTED TOGETHER, THE MAGNITUDE IN LINEAR UNITS OF THE RADII R1 TO R4 AND THE AXIAL THICKNESSES A1 TO A3 OF SAID FIRST, SECOND AND THIRD LENS MEMBERS L1, L2, L3, THEIR REFRACTIVE INDICES ND AND THEIR DISPERSION NUMBERS V BEING SUBSTANTIALLY AS GIVEN IN THE FOLLOWING TABLE:
Claim 2
Dependent Claim
62 words
A MAGNIFYING LENS COMPOSED OF A FIRST, A SECOND AND A THIRD LENS MEMBER CEMENTED TOGETHER, THE MAGNITUDE IN LINEAR UNITS OF THE RADII R1 TO R4 AND THE AXIAL THICKNESSES A1 TO A3 OF SAID FIRST, SECOND AND THIRD LENS MEMBERS L1, L2, L3, THEIR REFRACTIVE INDICES ND AND THEIR DISPERSION NUMBERS V BEING SUBSTANTIALLY AS GIVEN IN THE FOLLOWING TABLE:
References Cited (Backward Citations)
FR851297A
Cited
US2366228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |