US4855475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
(Meth)acrylic esters of phosphoric acid ester dihalides
Assignee: 3M Co
•
Filing: 1987-03-30
•
Granted: 1989-08-08
•
Expires: 2007-03-30
Abstract
Abstract Organic esters of chlorine-containing or bromine-containing phosphorus acids and BIS-GMA, as well as organic esters of phosphorus acids having chlorine or bromine bonded directly to phosphorus, the organic radical of said esters containing at least one polymerizable functional group. Also described are dental liner, restorative, composite, and adhesive compositions containing such organic esters, as well as methods for using such compositions to repair or veneer dental tissue.
Inventors
- 👤 James E. Bunker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:24
CPC Classifications
C; C09; C09J; C09J4/00; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/14; C07F9/141; C07F9/146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A polymerizable compound of the formula ##STR12## where R 1 denotes H or CH 3 ; R a denotes a C 3-37 organic residue having a valence of 2; and Z denotes Cl or Br.
Claim 2
Dependent Claim
35 words
A polymerizable compound of the formula ##STR12## where R 1 denotes H or CH 3 ; R a denotes a C 3-37 organic residue having a valence of 2; and Z denotes Cl or Br.
References Cited (Backward Citations)
US4670576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |