Patent US4016089A successfully refreshed from Google Patents.
US4016089A
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Denture cleaning concentrate
Assignee: Individual
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Filing: 1974-11-11
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Granted: 1977-04-05
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Expires: 1994-11-11
Abstract
Abstract A denture cleaning concentrate containing orthophosphoric acid, nonionic detergent, a quaternary ammonium germicide and an indicator which undergoes a color change in the pH range 4 to 4.6 is described.
Inventors
- 👤 Glen B. Regan
- 👤 Barrier F. Regan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:51
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/08; A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; A61K8/30; A61K8/33; A61K8/39; A61K8/40; A61K8/41; A61K8/416; A61Q; A61Q11/00; A61Q11/02; C11D1/00; C11D1/38; C11D1/62; C11D1/66; C11D1/835; C11D3/00; C11D3/40; A61K2800/00; A61K2800/40; A61K2800/42; A61K2800/45; C11D1/72
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A denture cleaning concentrate consisting essentially of an aqueous solution containing 4 to 10 percent by weight of orthophosphoric acid, 3.5 to 5 percent by weight of a water soluble alkyl phenyl polyglycolether, 0.5 to 1.0 percent by weight of a quaternary ammonium germicide containing one alkyl group of 10 to 20 carbon atoms and three lower organic radicals selected from the group consisting of methyl, ethyl and benzyl and 0.003 to 0.01 percent by weight of a chemical indicator for pH which undergoes a color change at pH about 4.5.
Claim 2
Dependent Claim
91 words
A denture cleaning concentrate consisting essentially of an aqueous solution containing 4 to 10 percent by weight of orthophosphoric acid, 3.5 to 5 percent by weight of a water soluble alkyl phenyl polyglycolether, 0.5 to 1.0 percent by weight of a quaternary ammonium germicide containing one alkyl group of 10 to 20 carbon atoms and three lower organic radicals selected from the group consisting of methyl, ethyl and benzyl and 0.003 to 0.01 percent by weight of a chemical indicator for pH which undergoes a color change at pH about 4.5.
Claim 3
Dependent Claim
14 words
Concentrate as defined in claim 1 wherein the chemical indicator is brom phenol blue.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |