Patent US3710779A successfully refreshed from Google Patents.
US3710779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of ultrasonic coupling
Assignee: F Hoffmann La Roche AG
•
Filing: 1971-12-14
•
Granted: 1973-01-16
•
Expires: 1991-12-14
Abstract
Abstract A method of assuring contact between an ultrasonic transducer and the skin of a subject during an ultrasonic monitoring operation utilizing a gel comprising polyvinylpyrrolidone and propylene glycol.
Inventors
- 👤 R Bunnell
- 👤 F Guerin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:14
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/06; A61K47/08; A61K47/10; A61K47/30; A61K47/32; G; G10; G10K; G10K11/00; G10K11/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
The method in accordance with claim 1 wherein said polyvinylpyrrolidone comprises from about 3.5 percent to about 25.0 percent by weight of said gel.
Claim 2
Dependent Claim
23 words
The method in accordance with claim 2 wherein said polyvinylpyrrolidone comprises from about6.85 percent to about 13.70 percent by weight of said gel.
Claim 3
Dependent Claim
14 words
The method in accordance with claim 3 wherein said gel contains a preserving agent.
Claim 4
Dependent Claim
27 words
The method in accordance with claim 4 wherein said preserving agent consists essentially of 0.1 percent by weight methyl paraben and 0.1 percent by weight propyl paraben.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |