Patent US4305928A successfully refreshed from Google Patents.
US4305928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentrifices
Assignee: Colgate Palmolive Co
•
Filing: 1980-12-09
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Granted: 1981-12-15
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Expires: 2000-12-09
Abstract
Abstract An additive, 0.05% to 5% of phytic acid, a chelator, unlike other chelators such as tartaric acid or ethylene diamine tetra acetic acid, prevents or reduces color fading of from 0.0007% to 0.5% of a water-soluble non-toxic red or yellow monoazo or blue triarylmethane dye-colored visually clear dentrifice containing both alkali metal monofluorophosphate in an amount to provide from 0.01% to 1% of fluorine and from 5% to 50% of a selected siliceous polishing agent having an index of refraction between 1.44 and 1.47, in a liquid vehicle having an index of refraction matching that of said siliceous polishing agent.
Inventors
- 👤 Kenneth Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:30
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/20; A61K8/21; A61K8/24; A61K8/25; A61K8/26; A61K8/30; A61K8/33; A61K8/36; A61K8/368; A61K8/55; A61Q; A61Q11/00; A61K2800/00; A61K2800/40; A61K2800/42; A61K2800/43
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
A visually clear dentrifice comprising a dentrifice vehicle containing from 5% to 50% of a siliceous polishing agent having an empirical SiO 2 content of at least 70%, a particle size in the range from 1 to 35 microns, a substantially amorphous X-ray structure and an index of refraction between 1.44 and 1.47; a liquid vehicle having an index of refraction matching that of said siliceous polishing agent; alkali metal monofluorophosphate in amount to provide from 0.01% to 1% of fluorine; from 0.0007% to 0.5% of a water-soluble non-toxic red or yellow monoazo dye or blue triarylmethane dye; and from 0.05% to 5% of phytic acid as an additive which prevents or reduces colour fading.
Claim 2
Dependent Claim
115 words
A visually clear dentrifice comprising a dentrifice vehicle containing from 5% to 50% of a siliceous polishing agent having an empirical SiO 2 content of at least 70%, a particle size in the range from 1 to 35 microns, a substantially amorphous X-ray structure and an index of refraction between 1.44 and 1.47; a liquid vehicle having an index of refraction matching that of said siliceous polishing agent; alkali metal monofluorophosphate in amount to provide from 0.01% to 1% of fluorine; from 0.0007% to 0.5% of a water-soluble non-toxic red or yellow monoazo dye or blue triarylmethane dye; and from 0.05% to 5% of phytic acid as an additive which prevents or reduces colour fading.
Claim 3
Dependent Claim
24 words
A dentrifice as claimed in claim 1 wherein the siliceous polishing agent has a particle size in the range from 2 to 20 microns.
Claim 4
Dependent Claim
26 words
A dentrifice as claimed in claim 1 wherein the polishing agent is sodium aluminosilicate which is present in amount in the range from 15% to 25%.
Claim 5
Dependent Claim
16 words
A dentrifice as claimed in claim 1 wherein the compound which provides fluorine is sodium monofluorophosphate.
Claim 6
Dependent Claim
18 words
A dentifrice as claimed in claim 1 wherein phytic acid is present in amount from 0.05% to 0.30%.
Claim 7
Dependent Claim
19 words
A dentrifice as claimed in claim 1 wherein the dye is a monoazo dye which dyes the dentrifice red.
Claim 8
Dependent Claim
19 words
A dentifrice as claimed in claim 1 wherein the dye is a monoazo dye which dyes said dentifrice yellow.
Claim 9
Dependent Claim
23 words
A dentifrice as claimed in claim 1 wherein the dye is a mixture of amaranth and F, D and C Yellow No 5.
Claim 10
Dependent Claim
19 words
A dentifrice as claimed in claim 1 wherein the dye is a triarylmethane dye which dyes the dentifrice blue.
Claim 11
Dependent Claim
13 words
A dentifrice as claimed in claim 1 contained in an unlined aluminium container.
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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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |