US2992103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic transfer-reversal processes utilizing screen members
Assignee: Polaroid Corp
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Filing: 1955-04-01
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Granted: 1961-07-11
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Expires: 1975-04-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
- 👤 Otto E Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:17
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/30; G03B; G03B17/00; G03B17/48; G03B17/50; G03B17/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN PROCESS FOR PRODUCING VISIBLE PHOTOGRAPHIC IMAGES IN CONJUNCTION WITH A PHOTOGRAPHIC SCREEN HAVING A REGULAR, GRID-LIKE ARRAY OF MINUTE LIGHT-TRANSMITTING AND MODIFYING ELEMENTS, THE STEPS WHICH COMPRISE POSITIONING SAID SCREEN IN SUPERPOSED RELATION WITH A SEPARATE SHEET OF A PHOTOSENSITIVE MATERIAL, DISTRIBUTING A VISCOUS FLUID PROCESSING COMPOSITION IN A LAYER BETWEEN SAID SCREEN AND THE PHOTOSENSITIVE SHEET, IMMEDIATELY PRIOR TO EXPOSURE OF SAID SHEET, TO FORM A SANDWICH STRUCTURE WHEREIN SAID SCREEN MEMBER AND SAID PHOTOSENSITIVE SHEET ARE HELD AGAINST RELATIVE MOVEMENT PARALLEL TO THEIR FACING SURFACES BY SAID LAYER OF FLUID; WHILE HOLDING SAID SCREEN AND SAID PHOTOSENSITIVE SHEET IN REGISTER AGAINST RELATIVE MOVEMENT, DIRECTING LIGHT THROUGH SAID SCREEN AND SAID LAYER OF FLUID TO EXPOSE SAID PHOTOSENSTIVE SHEET AND
Claim 2
Dependent Claim
122 words
IN PROCESS FOR PRODUCING VISIBLE PHOTOGRAPHIC IMAGES IN CONJUNCTION WITH A PHOTOGRAPHIC SCREEN HAVING A REGULAR, GRID-LIKE ARRAY OF MINUTE LIGHT-TRANSMITTING AND MODIFYING ELEMENTS, THE STEPS WHICH COMPRISE POSITIONING SAID SCREEN IN SUPERPOSED RELATION WITH A SEPARATE SHEET OF A PHOTOSENSITIVE MATERIAL, DISTRIBUTING A VISCOUS FLUID PROCESSING COMPOSITION IN A LAYER BETWEEN SAID SCREEN AND THE PHOTOSENSITIVE SHEET, IMMEDIATELY PRIOR TO EXPOSURE OF SAID SHEET, TO FORM A SANDWICH STRUCTURE WHEREIN SAID SCREEN MEMBER AND SAID PHOTOSENSITIVE SHEET ARE HELD AGAINST RELATIVE MOVEMENT PARALLEL TO THEIR FACING SURFACES BY SAID LAYER OF FLUID; WHILE HOLDING SAID SCREEN AND SAID PHOTOSENSITIVE SHEET IN REGISTER AGAINST RELATIVE MOVEMENT, DIRECTING LIGHT THROUGH SAID SCREEN AND SAID LAYER OF FLUID TO EXPOSE SAID PHOTOSENSTIVE SHEET AND
References Cited (Backward Citations)
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Cited
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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) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |