Patent US3815605A successfully refreshed from Google Patents.
US2703777A
Expired / Lapsed
US
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Ophthalmological preparations and vehicles and method of making the same
Assignee: Iso-Sol Co Inc
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Filing: 1950-05-02
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Granted: 1955-03-08
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Expires: 1970-05-02
Abstract
No abstract record available.
Inventors
- 👤 Feinstein Robert Robin
- 👤 Bechtold Arthur William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:52
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A VEHICLE FOR A GEL-LIKE, WATER SOLUBLE OPHTHALMOLOGICAL PREPARATION COMPRISING WATER, A BUFFER SYSTEM COMPRISING A PH CONTROL AGENT, A HUMECTANT AND METHYL CELLULOSE, TOGETHER WITH A POLYETHYLENE GLYCOL HAVNG A MOLECULAR WEIGHT BETWEEN ABOUT 200 AND 10,000 AS A BODYING AGENT TO PRODUCE AND MAINTAIN A VISCOSITY OF 1000-25,000 CENTIPOISES.
Claim 2
Dependent Claim
51 words
A VEHICLE FOR A GEL-LIKE, WATER SOLUBLE OPHTHALMOLOGICAL PREPARATION COMPRISING WATER, A BUFFER SYSTEM COMPRISING A PH CONTROL AGENT, A HUMECTANT AND METHYL CELLULOSE, TOGETHER WITH A POLYETHYLENE GLYCOL HAVNG A MOLECULAR WEIGHT BETWEEN ABOUT 200 AND 10,000 AS A BODYING AGENT TO PRODUCE AND MAINTAIN A VISCOSITY OF 1000-25,000 CENTIPOISES.
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) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |