US4294974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic silicone compounds and contact lenses containing polymers thereof
Assignee: American Optical Corp
•
Filing: 1979-12-17
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Granted: 1981-10-13
•
Expires: 1999-12-17
Abstract
Abstract Homopolymers and copolymers of compounds according to the formula: ##STR1## wherein R is an alkyl having 1 to 3 carbons, a+b+c+d=e, b=O to e, c=O to e, b+c>1, d=0 to 5, e=1 to 100, and Y is an organic group containing at least one>C═C<are hydrophilic as well as exhibiting properties similar to silicone compounds. The polymers are particularly useful in contact lenses having enhanced oxygen permeability.
Inventors
- 👤 Albert R. LeBoeuf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:06
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/20; C08G77/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
A hydrophilic siloxane having the formula: ##STR12## wherein R is an alkyl having 1 to 3 carbons, a+b+c+d=e, b=0 to e, c=0 to e, b+c>1, d=1 to 5, e=1 to 100, and Y is an organic group containing at least one >C═C<.
Claim 2
Dependent Claim
42 words
A hydrophilic siloxane having the formula: ##STR12## wherein R is an alkyl having 1 to 3 carbons, a+b+c+d=e, b=0 to e, c=0 to e, b+c>1, d=1 to 5, e=1 to 100, and Y is an organic group containing at least one >C═C<.
Claim 3
Dependent Claim
12 words
The hydrophilic siloxane of claim 1 wherein R is CH 3 .
Claim 4
Dependent Claim
12 words
The hydrophilic siloxane of claim 1 wherein a and b are 0.
Claim 5
Dependent Claim
12 words
The hydrophilic siloxane of claim 1 wherein a and c are 0.
Claim 6
Dependent Claim
10 words
The hydrophilic siloxane of claim 1 wherein a is 0.
Claim 7
Dependent Claim
10 words
The hydrophilic siloxane of claim 1 wherein b is 0.
Claim 8
Dependent Claim
10 words
The hydrophilic siloxane of claim 1 wherein c is 0.
Claim 9
Dependent Claim
10 words
The hydrophilic siloxane of claim 1 wherein Y is ##STR13##
Claim 10
Dependent Claim
10 words
The hydrophilic siloxane of claim 1 wherein Y is ##STR14##
Claim 11
Dependent Claim
18 words
The hydrophilic siloxane of claim 1 wherein Y is CH 2 CH 2 OCH 2 CH═CH 2 .
Claim 12
Dependent Claim
16 words
The hydrophilic siloxane of claim 1 wherein Y is ##STR15## and d is at least 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |