Patent US3030207A successfully refreshed from Google Patents.
US3030207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic processes
Assignee: Polaroid Corp
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Filing: 1958-05-07
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Granted: 1962-04-17
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Expires: 1978-05-07
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:26
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/32; G03C8/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A PHOTOGRAPHIC PROCESS COMPRISING THE STEPS OF SUPERPOSING A FIRST SHEET ON A SECOND SHEET SO THAT A SURFACE OF SAID FIRST SHEET AND A SURFACE OF SAID SECOND SHEET ARE, IN CONTIGUOUS RELATION THROUGHOUT A PREDETERMINED ARE, AT LEAST ONE SAID SHEETS BEING SUFFICIENTLY TRANSMISSIVE TO ACTINIC RADITION TO PERMIT EXPOSURE THERETHROUGH, SPREADING A PHOTOSENSITIVE SILVER HALIDE COMPOSITION IN A THIN LAYER IN A SUBSTANTIALLY PREDETERMINED DIRECTION BETWEEN AND IN CONTACT WITH SAID CONTIGUOUS SURFACE TO FORM A LAMINATED ASSEMBLAGE, MAINTAINING SAID FIRST AND SECOND SHEETS WITH THEIR CONTIGUOUS SURFACES IN SUPERPOSED RELATION TO PERMIT SAID PHOTOSENSITVE SILVER HALIDE COMPOSITION TO BECOME BONDED TO SAID FIRST SHEET TO FORM A PHOTOSENSITIVE COATING THEREON, THEREAFTER EXPOSING SAID PHOTOSENSITIVE COATING THROUGH SAID SHEET TRANSMISSIVE TO ACTINIC RADITION, THEN SPREADING A PROCESSING COMPOSITION INCLUDING A SILVER HALIDE DEVELOPER AND AN ALKALI IN A THIN LAYER IN A SUBSTANTIALLY PREDETERMINED DIRECTION BETWEEN SAID PHOTOSENSITIVE COATING AND SAID SECOND SHEET SO AS TO STRIP THEM APART AND THEN TO LAMINATE THEM TOGETHER AGAIN, AND MAINTAINING SAID FIRST AND SECOND SHEETS WITH THEIR CONTIGUOUS SURFACER IN SUPERPOSED RELATION FOR A PREDETERMINED PROCESSING TIME TO FORM. A VISIBLE IMAGE.
Claim 2
Dependent Claim
16 words
THE PHOTOGRAPHIC PROCESS ACCORDING TO CLAIM 2 WHEREIN SAID PROCESSING COMPOSITIONALSO INCLUDES A SILVER HALIDE SOLVENT.
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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |