US3905110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for drying dental surfaces
Assignee: Lee Pharmaceuticals Inc
•
Filing: 1972-11-03
•
Granted: 1975-09-16
•
Expires: 1992-11-03
Abstract
Abstract A blend of solvents, at least one of the solvents forming a low boiling azeotrope with water and at least one other solvent being miscible with water, which may contain a nonvolatile component which produces a hydrophobic film upon evaporation of the solvent. The solvent blend with or without the nonvolatile compound is useful as a drying agent for tooth surfaces.
Inventors
- 👤 Jr Henry L Lee
- 👤 Jan A Orlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:50
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A METHOD OF DRYING HARD TOOTH SURFACES COMPRISING APPLYING A SOLVENT BLEND, COMPRISING AT LEAST ONE SOLVENT CAPABLE OF FORMING AN AZEOTROPIC SOLUTION WITH WATER AND AT LEAST ONE OTHE SOLVENT WHICH IS SUBSTANTIALLY COMPLETELY MISCIBLE IN WATE, TO A TOOTH SURFACE AND THEN PERMITTING SAID BLEND TO EVAPORATE.
Claim 2
Independent Claim
49 words
A METHOD OF DRYING HARD TOOTH SURFACES COMPRISING APPLYING A SOLVENT BLEND, COMPRISING AT LEAST ONE SOLVENT CAPABLE OF FORMING AN AZEOTROPIC SOLUTION WITH WATER AND AT LEAST ONE OTHE SOLVENT WHICH IS SUBSTANTIALLY COMPLETELY MISCIBLE IN WATE, TO A TOOTH SURFACE AND THEN PERMITTING SAID BLEND TO EVAPORATE.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein said azeotrope forming solvent is diethyl ether and said water miscible solvent is substantially anhydrous acetone methanol or ethanol.
Claim 4
Dependent Claim
28 words
The method of claim 2 wherein said azeotrope forming and water miscible solvents are present in the ratio of from about 1: 2 to about 2:1 by weight.
Claim 5
Dependent Claim
26 words
The method of claim 3 wherein said blend further comprises a nonvolatile hydrophobic film forming component in a concentration of 0.5 to 10 percent by weight.
Claim 6
Dependent Claim
20 words
The method of claim 4 wherein said nonvolatile component is glycerophosphoric acid dimethacrylate, gamma-methacryloxypropyl trimethoxy silane or ethylene glycol dimethacrylate.
References Cited (Backward Citations)
US3471927A
Cited
US3507041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |