Patent US3320018A successfully refreshed from Google Patents.
US3320018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for photographing objects at least in part in a liquid medium
Assignee: Individual
•
Filing: 1963-04-29
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Granted: 1967-05-16
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Max H Pepke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:30
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
AN OPTICAL SYSTEM FOR SUBSTANTIALLY DISTORTIONLESS PHOTOGRAPHING OF OBJECTS IN A FIRST MEDIUM THROUGH BOUNDARY MEANS BETWEEN SAID FIRST MEDIUM AND A SECOND MEDIUM OF THE SAME OR DIFFERENT INDEX OF REFRACTION, SAID OPTICAL SYSTEM COMPRISING SAID BOUNDARY MEANS AND CAMERA LENS MEANS IN SAID SECONDARY MEDIUM THROUGH WHICH TO PHOTOGRAPH SAID OBJECTS, SAID BOUNDARY MEANS CONSISTING OF A
Claim 2
Dependent Claim
59 words
AN OPTICAL SYSTEM FOR SUBSTANTIALLY DISTORTIONLESS PHOTOGRAPHING OF OBJECTS IN A FIRST MEDIUM THROUGH BOUNDARY MEANS BETWEEN SAID FIRST MEDIUM AND A SECOND MEDIUM OF THE SAME OR DIFFERENT INDEX OF REFRACTION, SAID OPTICAL SYSTEM COMPRISING SAID BOUNDARY MEANS AND CAMERA LENS MEANS IN SAID SECONDARY MEDIUM THROUGH WHICH TO PHOTOGRAPH SAID OBJECTS, SAID BOUNDARY MEANS CONSISTING OF A
References Cited (Backward Citations)
US2008530A
Cited
US2001633A
Cited
US2730014A
Cited
FR1040064A
Cited
US2906187A
Cited
US2855826A
Cited
FR1167779A
Cited
US2909109A
Cited
US2944474A
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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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |