Patent US3978133A successfully refreshed from Google Patents.
US3978133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymerization initiators
Assignee: Sun Chemical Corp
•
Filing: 1974-11-18
•
Granted: 1976-08-31
•
Expires: 1994-11-18
Abstract
Abstract Ethylenically unsaturated monomers in the presence of a novel aromatic oligomeric compound or polymer having a polyhaloacetyl moiety attached thereto are polymerized upon exposure to a source of radiation.
Inventors
- 👤 Ralph H. Reiter
- 👤 George Rosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:44
CPC Classifications
C; C08; C08F; C08F257/00; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C45/61; C07C45/63; C07C49/00; C07C49/76; C07C49/80; C07C49/813; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
p-(Biphenylyl)-2,2,2-trichloroacetophenone.
Claim 2
Dependent Claim
1 words
p-(Biphenylyl)-2,2,2-trichloroacetophenone.
References Cited (Backward Citations)
DE1922627A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |