US3234022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion-transfer reversal processes and elements useful in such processes
Assignee: Polaroid Corp
•
Filing: 1960-08-08
•
Granted: 1966-02-08
•
Expires: 1980-08-08
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
- 👤 Meroe M Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:09
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE PROCESS OF FORMING IMAGES BY DIFFUSION-TRANSFER WHICH COMPRISES CONDENSING SILVER PRECIPITATING NUCLEI FROM THE VAPOR PHASE ON A SUPPORT IN A HIGHLY DISPERSED STATE AND ESSENTIALLY FREE OF PROTECTIVE COLLOID TO FORM A PRINT-RECEIVING ELEMENT, DEVELOPING A LATENT IMAGE IN AN EXPOSED SILVER HALIDE LAYER, FORMING A TRANSFERABLE SILVER COMPLEX WITH PART AT LEAST OF THE UNDEVELOPED SILVER HALIDE OF SAID LAYER, TRANSFERRING AT LEAST PART OF SAID COMPLEX TO SAID PRINT-RECEIVING ELEMENT, AND FORMING ON SAID SUPPORT BY MEANS OF THE SILVER TRANSFERRED TO SAID NUCLEI AN IMAGE COMPRISING SILVER.
Claim 2
Dependent Claim
92 words
THE PROCESS OF FORMING IMAGES BY DIFFUSION-TRANSFER WHICH COMPRISES CONDENSING SILVER PRECIPITATING NUCLEI FROM THE VAPOR PHASE ON A SUPPORT IN A HIGHLY DISPERSED STATE AND ESSENTIALLY FREE OF PROTECTIVE COLLOID TO FORM A PRINT-RECEIVING ELEMENT, DEVELOPING A LATENT IMAGE IN AN EXPOSED SILVER HALIDE LAYER, FORMING A TRANSFERABLE SILVER COMPLEX WITH PART AT LEAST OF THE UNDEVELOPED SILVER HALIDE OF SAID LAYER, TRANSFERRING AT LEAST PART OF SAID COMPLEX TO SAID PRINT-RECEIVING ELEMENT, AND FORMING ON SAID SUPPORT BY MEANS OF THE SILVER TRANSFERRED TO SAID NUCLEI AN IMAGE COMPRISING SILVER.
References Cited (Backward Citations)
US1999088A
Cited
US2447836A
Cited
US2808351A
Cited
US2798140A
Cited
US2945771A
Cited
US2789054A
Cited
US2751300A
Cited
US2698237A
Cited
US2878121A
Cited
US2982650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |