Patent US3586503A successfully refreshed from Google Patents.
US3586503A
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US
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Hardening agents for image-receiving elements
Assignee: Polaroid Corp
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Filing: 1966-12-30
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Granted: 1971-06-22
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Expires: 1986-12-30
Abstract
Abstract THE PROCESS OF HARDENING A POLYMERIC PHOTOGRAPHIC IMAGE-RECEIVING LAYER CONTAINING RADICALS SELECTED FROM THE GROUP CONSISTING OF -OH, -NH2 AND -SH RADICALS, INCLUDING THE STEPS OF ADDING TO A SOLUTION OF THE POLYMER A CROSS LINKING AGENT WHICH IS A CONDENSATE OF ACROLEIN AND EITHER A TETRALOWERALKOXY-PROPANE OR A LOWER ALKYLMONOALDEHYDE OTHER THAN FORMALDEHYDE, AND THEREAFTER CASTING AND DRYING A LAYER OF THE SOLUTION.
Inventors
- 👤 Lloyd D Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:42
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08L; C08L29/00; C08L29/12; C08L61/00; C08L61/02; C09; C09D; C09D129/00; C09D129/14; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/307; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |