US3196015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion transfer process
Assignee: Polaroid Corp
•
Filing: 1962-01-31
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Granted: 1965-07-20
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Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 William H Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:47
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C8/00; G03C8/02; G03C8/04; G03C8/06; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A DIFFUSION TRANSFER PROCESS WHICH COMPRISES THE STEPS OF DEVELOPING AN EXPOSED PHOTOSENSITIVE EMULSION AND FORMING THEREBY AN IMAGE-WISE DISTRIBUTION OF IMAGEFORMING COMPONENTS IN SAID PHOTOSENSITIVE EMULSION, AS A FUNCTION OF THE POINT-TO-POINT DEGREE OF EXPOSURE, THEREOF, AND TRANSFERRING, AT LEAST PART OF SAID IMAGE-WISE DISTRIBUTION, BY DIFFUSION, TO A CONTIGUOUS IMAGE-RECEIVING LAYER TO PROVIDE THERETO A VISIBLE TRANSFER IMAGE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING A HYDROXYETHYL POLYVINYL ALCOHOL SILVER HALIDE PHOTOSENSITIVE EMULSION.
Claim 2
Dependent Claim
74 words
IN A DIFFUSION TRANSFER PROCESS WHICH COMPRISES THE STEPS OF DEVELOPING AN EXPOSED PHOTOSENSITIVE EMULSION AND FORMING THEREBY AN IMAGE-WISE DISTRIBUTION OF IMAGEFORMING COMPONENTS IN SAID PHOTOSENSITIVE EMULSION, AS A FUNCTION OF THE POINT-TO-POINT DEGREE OF EXPOSURE, THEREOF, AND TRANSFERRING, AT LEAST PART OF SAID IMAGE-WISE DISTRIBUTION, BY DIFFUSION, TO A CONTIGUOUS IMAGE-RECEIVING LAYER TO PROVIDE THERETO A VISIBLE TRANSFER IMAGE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING A HYDROXYETHYL POLYVINYL ALCOHOL SILVER HALIDE PHOTOSENSITIVE EMULSION.
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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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |