US4495361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysiloxane composition with improved surface wetting characteristics and biomedical devices made thereof
Assignee: Bausch and Lomb Inc
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Filing: 1983-04-29
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Granted: 1985-01-22
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Expires: 2003-04-29
Abstract
Abstract The surface wetting characteristics of polysiloxanes prepared from monomeric polysiloxanes endcapped with activated unsaturated groups and modulus modifiers are improved by the inclusion of small amounts of an N-alkenoyl trialkylsilyl aminate. The improved polymeric compositions can be used to form hard, gas permeable contact lenses and other biomedical devices.
Inventors
- 👤 Gary D. Friends
- 👤 John B. Melpolder
- 👤 Jay F. Kunzler
- 👤 Joon S. Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:52
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/14; A61L27/18; A61L27/50; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1896; C08; C08F; C08F283/00; C08F283/12; C08F283/124; C08F30/00; C08F30/04; C08F30/08; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
N-Alkenoyl trialkylsilyl aminates of the formula CH.sub.2 ═C(E)C(O)N(H)CH(G)(CH.sub.2).sub.m C(O)OSi(R).sub.3 wherein E is H or CH 3 , G is (CH 2 ) x C(O)OSi(R) 3 or H, R is CH 3 , C 2 H 5 or C 3 H 7 , m is an integer from 0 to 15, and x is an integer from 0 to 10, and m+x is an integer from 1 to 15.
Claim 2
Dependent Claim
68 words
N-Alkenoyl trialkylsilyl aminates of the formula CH.sub.2 ═C(E)C(O)N(H)CH(G)(CH.sub.2).sub.m C(O)OSi(R).sub.3 wherein E is H or CH 3 , G is (CH 2 ) x C(O)OSi(R) 3 or H, R is CH 3 , C 2 H 5 or C 3 H 7 , m is an integer from 0 to 15, and x is an integer from 0 to 10, and m+x is an integer from 1 to 15.
Claim 3
Dependent Claim
11 words
The aminate of claim 1 wherein E is CH 3 .
Claim 4
Dependent Claim
10 words
The aminate of claim 2 wherein G is (CH.sub.2).sub.x C(O)OSi(R).sub.3.
Claim 5
Dependent Claim
15 words
The aminate of claim 3 is of the formula CH.sub.2 ═C(CH).sub.3)C(O)N(H)CH[C(O)OSi(C.sub.2 H.sub.5).sub.3 ]CH.sub.2 C(O)OSi(C.sub.2 H.sub.5).sub.3.
Claim 6
Dependent Claim
13 words
The aminate of claim 3 is of the formula CH.sub.2 ═C(CH.sub.3)C(O)N(H)CH[C(O)OSi(CH.sub.3).sub.3 ](CH.sub.2).sub.2 C(O)OSi(CH.sub.3).sub.3.
Claim 7
Dependent Claim
9 words
The aminate of claim 2 wherein G is H.
Claim 8
Dependent Claim
13 words
The aminate of claim 6 is of the formula CH.sub.2 ═C(CH.sub.3)C(O)N(H)CH.sub.2 C(O)OSi(C.sub.2 H.sub.5).sub.3.
Claim 9
Dependent Claim
13 words
The aminate of claim 6 is of the formula CH.sub.2 ═C(CH.sub.3)C(O)N(H)CH.sub.2 (CH.sub.2).sub.6 C(O)OSi(CH.sub.3).sub.3.
Claim 10
Dependent Claim
12 words
The aminate of claim 6 is of the formula CH.sub.2 ═C(CH.sub.3)C(O)N(H)(CH.sub.2).sub.11 C(O)OSi(CH.sub.3).sub.3.
Claim 11
Dependent Claim
9 words
The aminate of claim 1 wherein E is H.
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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |