Patent US3944509A successfully refreshed from Google Patents.
US3944509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keto dioxolanes
Assignee: Sun Chemical Corp
•
Filing: 1973-06-11
•
Granted: 1976-03-16
•
Expires: 1993-06-11
Abstract
Abstract Ethylenically unsaturated monomeric esters in the presence of keto-dioxolane compounds are polymerized upon exposure to a source of radiation.
Inventors
- 👤 William R. Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:58
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/26; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08F20/00; C08F20/02; C08F20/10; C08F20/20; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
1 words
2-Trichloromethyl-4-benzoyl-4-phenyl-1,3-dioxolane.
Claim 2
Dependent Claim
1 words
2-Trichloromethyl-4-benzoyl-4-phenyl-1,3-dioxolane.
Claim 3
Dependent Claim
1 words
2-(p-Dimethylaminophenyl)-4-benzoyl-4-phenyl-1,3-dioxolane.
Claim 4
Dependent Claim
1 words
2-(p-Dimethylaminophenyl)-4-benzoyl-4-phenyl-1,3-dioxolane.
Claim 5
Dependent Claim
1 words
2-Cinnamyl-4-benzoyl-4-phenyl-1,3-dioxolane.
Claim 6
Dependent Claim
1 words
2-Cinnamyl-4-benzoyl-4-phenyl-1,3-dioxolane.
Claim 7
Dependent Claim
1 words
2-Furyl-4-benzoyl-4-phenyl-1,3-dioxolane.
Claim 8
Dependent Claim
1 words
2-Furyl-4-benzoyl-4-phenyl-1,3-dioxolane.
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |