Patent US4112186A successfully refreshed from Google Patents.
US4112186A
Expired / Lapsed
US
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Ultraviolet absorbing coatings
Assignee: 3M Co
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Filing: 1977-01-28
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Granted: 1978-09-05
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Expires: 1997-01-28
Abstract
Abstract Thin nonorganic films of complexes of titanium and stannous tin are formed on organic polymeric substrates to provide ultraviolet absorbing coatings which retard degradation of the polymeric material of the substrate due to ultraviolet light.
Inventors
- 👤 Roger W. Lange
- 👤 Harold G. Sowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:28
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/043; Y; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S126/908; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T442/00; Y10T442/20; Y10T442/259; Y10T442/2607
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
A visually transparent composite of ultraviolet degradable polymeric sheet material and on at least one surface ultraviolet light absorptive insoluble complex of titanate ester and soluble stannous non-organic salt.
Claim 2
Dependent Claim
29 words
A visually transparent composite of ultraviolet degradable polymeric sheet material and on at least one surface ultraviolet light absorptive insoluble complex of titanate ester and soluble stannous non-organic salt.
Claim 3
Dependent Claim
30 words
The visually transparent composite according to claim 1 of polyarylsulfone sheet and on at least one surface ultraviolet light absorptive insoluble complex of titanate ester and soluble stannous non-organic salt.
References Cited (Backward Citations)
US3005731A
Cited
US3647531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |