Patent US3720635A successfully refreshed from Google Patents.
US3720635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester moulding and coating masses which can be cured by ultraviolet irradiation
Assignee: Bayer AG
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Filing: 1971-05-05
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Granted: 1973-03-13
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Expires: 1991-05-05
Abstract
Abstract Moulding and coating masses which can be cured by UV-irradiation and consist of mixtures of unsaturated polyesters and copolymerizable monomeric compounds with a content of phenylthio derivates of acetophenones as photosensitizers.
Inventors
- 👤 W Metzner
- 👤 H Schnell
- 👤 H Heine
- 👤 K Fuhr
- 👤 H Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:23
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A moulding and coating mass which can be cured by UV irradiation comprising a mixture of an unsaturated polyester, a monomeric compound selected from the group consisting of styrene, Alpha -methylstyrene, vinyl toluene, acrylic acid ester, methacrylic acid ester, acrylic acid amide and methacrylic acid amide and a photosensitizing amount of a compound of the formula wherein R1 and R2 are each an aromatic radical and R3 and R4 are each hydrogen or alkyl having from one to two carbon atoms.
Claim 2
Dependent Claim
81 words
A moulding and coating mass which can be cured by UV irradiation comprising a mixture of an unsaturated polyester, a monomeric compound selected from the group consisting of styrene, Alpha -methylstyrene, vinyl toluene, acrylic acid ester, methacrylic acid ester, acrylic acid amide and methacrylic acid amide and a photosensitizing amount of a compound of the formula wherein R1 and R2 are each an aromatic radical and R3 and R4 are each hydrogen or alkyl having from one to two carbon atoms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |