US3205083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-violet absorbers
Assignee: Air Products and Chemicals Inc
•
Filing: 1961-07-31
•
Granted: 1965-09-07
•
Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Harold A Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:25
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/64; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A POLYMERIC MATERIAL CHARACTERIZED BY RESISTANCE TO DETERIORATION IN ULTRA-VIOLET LIGHT WHICH COMPOSITION CONSITS ESSENTIALLY OF POLYMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYETHYLENE, POLYSTYRENE, POLYESTERS, AND CELLULOSE ACETATE AND FROM 0.10 TO 5% BY WEIGHT OF 1,4-BIS-(4,5-DIPHENYL IMIDAZOLYL)BENZENE AS AN ULTRA-VIOLET LIGHT ABSORBER.
Claim 2
Dependent Claim
47 words
A POLYMERIC MATERIAL CHARACTERIZED BY RESISTANCE TO DETERIORATION IN ULTRA-VIOLET LIGHT WHICH COMPOSITION CONSITS ESSENTIALLY OF POLYMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYETHYLENE, POLYSTYRENE, POLYESTERS, AND CELLULOSE ACETATE AND FROM 0.10 TO 5% BY WEIGHT OF 1,4-BIS-(4,5-DIPHENYL IMIDAZOLYL)BENZENE AS AN ULTRA-VIOLET LIGHT ABSORBER.
Claim 3
Independent Claim
49 words
THE METHOD OF INCREASING THE RESISTANCE OF POLYMERIC MATERIALS SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYETHYLENE, POLYSTYRENE, POLYESTERS, AND CELLULOSE ACETATE TO SUNLIGHT WHICH INCLUDES THE STEP OF: INCORPORATING AS AN ULTRA-VIOLET LIGHT ABSORBER IN SUCH POLYMERIC MATERIAL FROM 0.10 TO 5% BY WEIGHT OF 2-(4-DIMETHYLAMINOPHENYL)-4,5-DIPHENYL IMIDAZOLE.
Claim 4
Independent Claim
49 words
THE METHOD OF INCREASING THE RESISTANCE OF POLYMERIC MATERIALS SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYETHYLENE, POLYSTYRENE, POLYESTERS, AND CELLULOSE ACETATE TO SUNLIGHT WHICH INCLUDES THE STEP OF: INCORPORATING AS AN ULTRA-VIOLET LIGHT ABSORBER IN SUCH POLYMERIC MATERIAL FROM 0.10 TO 5% BY WEIGHT OF 2-(4-DIMETHYLAMINOPHENYL)-4,5-DIPHENYL IMIDAZOLE.
References Cited (Backward Citations)
US2585388A
Cited
US2726246A
Cited
US2654761A
Cited
US2713546A
Cited
US2985661A
Cited
US2995540A
Cited
US3095422A
Cited
US3050520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |