US4130706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic, oxygen permeable contact lens
Assignee: EIDP Inc
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Filing: 1977-08-08
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Granted: 1978-12-19
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Expires: 1997-08-08
Abstract
Abstract A contact lens which when saturated with water has oxygen permeability of greater than 500 centibarrers and a receding contact angle with water of less than 35°. The lens is formed of a polymer containing from 20 to 80 weight percent of repeating units of the structure ##STR1## where --R is --H or CH 3 and R 1 contains from 2 to 10 carbon atoms and at least one polar group. In a preferred aspect --R 1 is --CH 2 CH 2 OH or --CH 2 CHOHCH 3 . The polymer also contains from 80 to 20 weight percent of repeating units of the structure ##STR2## where --R 2 is --H or --CH 3 and n is 1 to 4.
Inventors
- 👤 Louis Plambeck, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:56
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/20; C08F220/22; C08F220/24; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
A contact lens having a surface formed of a polymer consisting essentially of from 20 to 80 weight percent units of the structure ##STR5## wherein --R is selected from the class consisting of --H and --CH 3 and --R 1 is a group containing from 2 to 10 carbon atoms which contains at least one polar group selected from the class consisting of --OH, --COOH, CONH 2 , and --SO 3 H, and from 80 to 20 weight percent units of the structure ##STR6## wherein --R 2 is selected from the class consisting of --H and --CH 3 and n is an integer from 1 to 4, which polymer on being saturated with water has an oxygen permeability of at least 500 centibarrers and a receding contact angle with water of less than 35°.
Claim 2
Dependent Claim
134 words
A contact lens having a surface formed of a polymer consisting essentially of from 20 to 80 weight percent units of the structure ##STR5## wherein --R is selected from the class consisting of --H and --CH 3 and --R 1 is a group containing from 2 to 10 carbon atoms which contains at least one polar group selected from the class consisting of --OH, --COOH, CONH 2 , and --SO 3 H, and from 80 to 20 weight percent units of the structure ##STR6## wherein --R 2 is selected from the class consisting of --H and --CH 3 and n is an integer from 1 to 4, which polymer on being saturated with water has an oxygen permeability of at least 500 centibarrers and a receding contact angle with water of less than 35°.
Claim 3
Dependent Claim
19 words
The contact lens of claim 1 wherein the entire lens is formed of the same polymer as the surface.
Claim 4
Dependent Claim
24 words
The contact lens of claim 2 wherein --R 1 is --(CH 2 ) m --OH and m is an integer from 2 to 4.
Claim 5
Dependent Claim
12 words
The contact lens of claim 3 wherein R is CH 3 .
Claim 6
Dependent Claim
13 words
The contact lens of claim 4 wherein R 2 is CH 3 .
Claim 7
Dependent Claim
10 words
The contact lens of claim 5 wherein m is 2.
Claim 8
Dependent Claim
10 words
The contact lens of claim 6 wherein n is 1.
Claim 9
Dependent Claim
10 words
The contact lens of claim 7 wherein n is 2.
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) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |