US3686084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Initiators for the photopolymerisation of unsaturated compounds
Assignee: Bayer AG
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Filing: 1970-09-14
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Granted: 1972-08-22
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Expires: 1990-09-14
Abstract
Abstract THE INVENTION RELATES TO UNSATURATED POLYMERISABLE COMPOUNDS AND MIXTURES OF SUCH COMPOUNDS ADMIXED WITH BENZOPHENONES EACH OF THE TWO NUCLEI OF WHICH BEING SUBSTITUTED BY A HALOGENATED METHYL GROUP. IF SAID COMPOSITIONS ARE IRRADIATED BY ULTRAVIOLET LIGHT, THE BENZOPHENONE DERIVATIVES SPLIT OFF FREE RADICALS WHICH INITATE THE POLYMERISATION OF THE UNSATURATED COMPOUNDS.
Inventors
- 👤 Hans-Jurgen Rosenkranz
- 👤 Hans Rudolph
- 👤 Hans-Georg Heine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:41
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01; C08F2/00; C08F2/46; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |