Patent US3725231A successfully refreshed from Google Patents.
US3725231A
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Photosensitive diacetone acrylamide resins
Assignee: Lubrizol Corp
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Filing: 1971-08-20
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Granted: 1973-04-03
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Expires: 1991-08-20
Abstract
Abstract DIACETONE ACRYLAMIDE AND ANALOGOUS SUBSTITUTED ACRYLAMIDES REACT WITH ALDEHYDES CONTAINING CONJUGATE UNSATURATION WITH RESPECT TO THE CARBONYL GROUP, IN THE PRESENCE OF AN ALKAINE REAGENT, TO YIELD MONOMERIC COMPOUNDS WHICH ARE PHOTOSENSITIVE AND WHICH FORM PHOTOSENSITIVE POLYMERS. THE LATTER CAN ALSO BE PREPARED BY REACTING SAID ALDEHYDES WITH A DIACETONE ACRYLAMIDE POLYMER WHILE GRADUALLY ADDING SAID ALKALINE REAGENT. THE POLYMERS CROSSLINK ON EXPOSURE TO VISIBLE OR (PREFERABLY) ULTRAVIOLET RADIATION AND ARE USEFUL IN THE PREPARATION OF LITHOGRAPHIC PRINTING PLATES, PHOTORESISTS, ETC.
Inventors
- 👤 R Jahnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:01
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/52; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |