Patent US3575701A successfully refreshed from Google Patents.
US3575701A
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US
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Polyvinylamide grafts in spacer layers for color diffusion transfer imagereceiving units
Assignee: Polaroid Corp
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Filing: 1969-01-13
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Granted: 1971-04-20
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Expires: 1989-01-13
Abstract
Abstract AN IMAGE-RECEIVING ELEMENT FOR DIFFUSION TRANSFER COLOR PROCESSES COMPRISING A POLYVINYLAMIDE GRAFT COPOLYMER SPACER LAYER.
Inventors
- 👤 Lloyd D Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:17
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |