US2547653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid for use in contact with the human eyeball
Assignee: Individual
•
Filing: 1948-03-10
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Granted: 1951-04-03
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Expires: 1968-03-10
Abstract
No abstract record available.
Inventors
- 👤 Bradford R Minnis
- 👤 James H Conover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0048; A61F; A61F9/00; A61F9/0008; A61L; A61L12/00; A61L12/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A CLEAR AQUEOUS SOLUTION HAVING APPROXIMATELY THE SAME OSMOTIC PRESSURE AS THE NATURAL FLUIDS OF THE HUMAN EYE WHICH COMPRISES INGREDIENTS NORMALLY USED TO PRODUCE ISOTONIC SOLUTIONS AND AT LEAST ABOUT 2 PARTS PER MILLION PARTS OF SOLUTION OF ALKALI METAL PHOSPHATE SELECTED FROM THE GROUP OF THE METAPHOSPHATES, THE PYROPHOSPHATES AND THE POLYPHOSPHATES.
Claim 2
Dependent Claim
54 words
A CLEAR AQUEOUS SOLUTION HAVING APPROXIMATELY THE SAME OSMOTIC PRESSURE AS THE NATURAL FLUIDS OF THE HUMAN EYE WHICH COMPRISES INGREDIENTS NORMALLY USED TO PRODUCE ISOTONIC SOLUTIONS AND AT LEAST ABOUT 2 PARTS PER MILLION PARTS OF SOLUTION OF ALKALI METAL PHOSPHATE SELECTED FROM THE GROUP OF THE METAPHOSPHATES, THE PYROPHOSPHATES AND THE POLYPHOSPHATES.
References Cited (Backward Citations)
US1858905A
Cited
US2078943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |