US3183152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treated polyvinyl alcohol for contact lens solution
Assignee: Barnes Hind Pharmaceuticals Inc
•
Filing: 1963-05-21
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Granted: 1965-05-11
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Expires: 1983-05-21
Abstract
No abstract record available.
Inventors
- 👤 Ivan J Szekely
- 👤 Harry W Hind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
A; A61; A61L; A61L12/00; A61L12/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A WETTING SOLUTION SUITABLE FOR USE WITH CONTACT LENSES COMPRISING AN AQUEOUS SOLUTION OF POLYVINYL ALCOHOL, SAID POLYVINYL ALCOHOL BEING PRESENT IN AN AMOUNT OF FROM 0.1 TO 6% BY WEIGHT AND HAVING BEEN MODIFIED BY THE REMOVAL OF SUBSTANTIALLY ALL VOLATILE MATERIALS THEREFROM BOILING BELOW ABOUT 100*C.
Claim 2
Dependent Claim
48 words
A WETTING SOLUTION SUITABLE FOR USE WITH CONTACT LENSES COMPRISING AN AQUEOUS SOLUTION OF POLYVINYL ALCOHOL, SAID POLYVINYL ALCOHOL BEING PRESENT IN AN AMOUNT OF FROM 0.1 TO 6% BY WEIGHT AND HAVING BEEN MODIFIED BY THE REMOVAL OF SUBSTANTIALLY ALL VOLATILE MATERIALS THEREFROM BOILING BELOW ABOUT 100*C.
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) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |