Patent US5068846A successfully refreshed from Google Patents.
US3616366A
Expired / Lapsed
US
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Photocehmically hardenable unsaturated polyester compositions containing a novel stabilizer system
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1969-12-29
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Granted: 1971-10-26
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Expires: 1989-12-29
Abstract
Abstract Stable, photochemically hardenable unsaturated polyester compositions containing an alkyl or aryl phosphite, a quaternary ammonium compound and an organic sulphonyl halide.
Inventors
- 👤 Beppino Passalenti
- 👤 Silvio Vargiu
- 👤 Ugo Nistri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C08F; C08F283/00; C08F283/01; C08K5/49; C08K5/51; C08K5/52; C08K5/524; Y; Y10; Y10S; Y10S525/00; Y10S525/904
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
12 words
Compositions as in claim 1, in which the unsaturated monomer is styrene.
Claim 2
Dependent Claim
22 words
Compositions as in claim 1, in which the unsaturated monomer is present to the extent of 20 to 70 percent by weight.
Claim 3
Dependent Claim
23 words
Compositions as in claim 1, in which the phosphite is selected from the group consisting of trimethyl phosphite, triethyl phosphite and triphenyl phosphite.
Claim 4
Dependent Claim
19 words
Compositions as in claim 1, in which the phosphite is present to the extent of 100 to 1,000 p.p.m.
Claim 5
Dependent Claim
21 words
Compositions as in claim 1, in which the quaternary ammonium salt is present to the extent of 500 to 2,000 p.p.m.
Claim 6
Dependent Claim
22 words
Compositions as in claim 1, in which the light-sensitive compounds are present to the extent of 0.1 to 4.0 percent by weight.
Claim 7
Dependent Claim
22 words
Hardened polyester compositions made by irradiation of the compositions of claim 1 with light having a wavelength of 2,500 to 4,000 A.
Claim 8
Dependent Claim
22 words
Process of irradiating the hardenable polyester composition of claim 1 by subjecting said composition to light of wavelength of 2,500 to 4,000A.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |