US3352771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of halo acrylate monomers using ultraviolet light and hydroxy substituted benzophenone absorbers
Assignee: GAF Chemicals Corp
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Filing: 1964-03-17
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Granted: 1967-11-14
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Expires: 1984-03-17
Abstract
No abstract record available.
Inventors
- 👤 Harry D Anspon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:01
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
PROCESS FOR POLYMERIZING HALO-ACRYLATE MONOMER TO PRODUCE FLAW-FREE MASSIVE POLYMERIC STRUCTURES, WHICH COMPRISES ADDING TO THE MONOMER 0.001 TO 0.1% BY WEIGHT OF A HYDROXY SUBSTITUTED BENZOPHENONE ULTRA VIOLET ABSORBER WHICH IS SOLUBLE THEREIN, PLACING THE MONOMER IN A MOLD APPROPRIATE TO THE DESIRED STRUCTURE AND TRANSPARENT TO RADIATION, AND IRRADIATING WITH ULTRA VIOLET LIGHT HAVING A SPECTRUM SUCH THAT 70 TO 95% OF THE EFFECTIVE RADIATION IS ABSORBED AND THE REMAINDER PENETRATES THROUGHT HE MONOMER, WHEREBY POLYMERIZATION TO A SUBSTANTIALLY UNIFORM DEGREE THROUGHOUT IS OBTAINED.
Claim 2
Dependent Claim
86 words
PROCESS FOR POLYMERIZING HALO-ACRYLATE MONOMER TO PRODUCE FLAW-FREE MASSIVE POLYMERIC STRUCTURES, WHICH COMPRISES ADDING TO THE MONOMER 0.001 TO 0.1% BY WEIGHT OF A HYDROXY SUBSTITUTED BENZOPHENONE ULTRA VIOLET ABSORBER WHICH IS SOLUBLE THEREIN, PLACING THE MONOMER IN A MOLD APPROPRIATE TO THE DESIRED STRUCTURE AND TRANSPARENT TO RADIATION, AND IRRADIATING WITH ULTRA VIOLET LIGHT HAVING A SPECTRUM SUCH THAT 70 TO 95% OF THE EFFECTIVE RADIATION IS ABSORBED AND THE REMAINDER PENETRATES THROUGHT HE MONOMER, WHEREBY POLYMERIZATION TO A SUBSTANTIALLY UNIFORM DEGREE THROUGHOUT IS OBTAINED.
References Cited (Backward Citations)
US2900361A
Cited
US2853521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |