Patent US1790178A successfully refreshed from Google Patents.
US4180467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable denture soak product
Assignee: Colgate Palmolive Co
•
Filing: 1976-01-20
•
Granted: 1979-12-25
•
Expires: 1996-01-20
Abstract
Abstract This disclosure relates to effervescent denture soak compositions having stability and sustained effervescence comprising an acid anhydride, a solid organic acid, a solid inorganic carbonate and oxidizing agents. The acid anhydride reduces caking tendencies by acting as an internal dessicant and increase the effervescence time (CO2 evolution).
Inventors
- 👤 Jordan B. Barth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:16
CPC Classifications
A; A61; A61Q; A61Q11/00; A61Q11/02; A61K; A61K8/00; A61K8/18; A61K8/19; A61K2800/00; A61K2800/20; A61K2800/22; A61K2800/222
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A stable water-soluble solid composition with sustained carbon dioxide effervescence and of substantially neutral pH when dissolved in an aqueous solution consisting essentially of 20 to 43% by weight of at least one solid water-soluble inorganic peroxygen salt, 35 to 50% by weight of sodium or potassium bicarbonate compound, 15 to 25% by weight of a solid water-soluble organic acid selected from the group consisting of tartaric, citric, malic, maleic, fumaric and succinic acids and 5 to 10% by weight of a solid water-soluble acid anhydride capable of hydrolyzing and reacting with the said carbonate to evolve carbon dioxide when said composition is dissolved in water and selected from the group consisting of boric, succinic, adipic, fumaric, tartaric, citric, malic and maleic anhydrides.
Claim 2
Dependent Claim
123 words
A stable water-soluble solid composition with sustained carbon dioxide effervescence and of substantially neutral pH when dissolved in an aqueous solution consisting essentially of 20 to 43% by weight of at least one solid water-soluble inorganic peroxygen salt, 35 to 50% by weight of sodium or potassium bicarbonate compound, 15 to 25% by weight of a solid water-soluble organic acid selected from the group consisting of tartaric, citric, malic, maleic, fumaric and succinic acids and 5 to 10% by weight of a solid water-soluble acid anhydride capable of hydrolyzing and reacting with the said carbonate to evolve carbon dioxide when said composition is dissolved in water and selected from the group consisting of boric, succinic, adipic, fumaric, tartaric, citric, malic and maleic anhydrides.
Claim 3
Dependent Claim
42 words
A composition in accordance with claim 1 wherein said water-soluble inorganic peroxygen salt is a mixture of potassium persulfate and sodium perborate, said bicarbonate compound is sodium bicarbonate and the weight ratio of bicarbonate to acid ranges from about 3:2 to 3:1.
Claim 4
Dependent Claim
15 words
A composition according to claim 2 wherein said weight ratio is at least about 2:1.
References Cited (Backward Citations)
US3518343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |