US4000118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorings
Assignee: Dynapol Shareholders Liquidating Trust
•
Filing: 1975-02-11
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Granted: 1976-12-28
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Expires: 1995-02-11
Abstract
Abstract Nontoxic coloring compositions which comprise optically chromophoric groups attached via sulfonamido linkages to nondegradable chemical molecules having molecular dimensions which substantially prevent their absorption from the gastrointestinal tract are disclosed. The colorings find primary applications as food colors.
Inventors
- 👤 Daniel J. Dawson
- 👤 Josef Rudinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:38
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/10; A; A23; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/47; Y; Y10; Y10S; Y10S534/00; Y10S534/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
A nontoxic coloring composition having the formula ##STR31## wherein M is a nondegradable, nondigestable organic polymer backbone having at least two carbon atoms and dimensions such that the coloring composition molecule has a molecular weight of at least 1,000 and is too large to pass through the mucosa of the gastrointestinal tract, K is an optically chromophoric group, ##STR32## is a sulfonamido linkage attaching K to M wherein R is hydrogen or a hydrocarbon of up to and including 6 carbon atoms, said sulfonamido linkage being positioned with its NR group being separate from but attached to M and its SO 2 group being attached to K, and wherein Z is a positive integer.
Claim 2
Dependent Claim
114 words
A nontoxic coloring composition having the formula ##STR31## wherein M is a nondegradable, nondigestable organic polymer backbone having at least two carbon atoms and dimensions such that the coloring composition molecule has a molecular weight of at least 1,000 and is too large to pass through the mucosa of the gastrointestinal tract, K is an optically chromophoric group, ##STR32## is a sulfonamido linkage attaching K to M wherein R is hydrogen or a hydrocarbon of up to and including 6 carbon atoms, said sulfonamido linkage being positioned with its NR group being separate from but attached to M and its SO 2 group being attached to K, and wherein Z is a positive integer.
Claim 3
Dependent Claim
20 words
The coloring composition of claim 1 wherein R is hydrogen and z has a value of from 10 to 5,000.
Claim 4
Dependent Claim
18 words
The coloring composition of claim 2 wherein K comprises an azo chromophore which exists as a sulfonate salt.
Claim 5
Dependent Claim
10 words
The coloring composition of claim 2 wherein K is ##STR33##
Claim 6
Dependent Claim
10 words
The coloring composition of claim 4 wherein M is polyethylene.
Claim 7
Dependent Claim
10 words
The coloring composition of claim 2 wherein K is ##STR34##
Claim 8
Dependent Claim
10 words
The coloring composition of claim 6 wherein M is polyethylene.
Claim 9
Dependent Claim
10 words
The coloring composition of claim 2 wherein K is ##STR35##
Claim 10
Dependent Claim
10 words
The coloring composition of claim 8 wherein M is polyethylene.
Claim 11
Dependent Claim
10 words
The coloring composition of claim 2 wherein K is ##STR36##
Claim 12
Dependent Claim
10 words
The coloring composition of claim 2 wherein K is ##STR37##
References Cited (Backward Citations)
US3190850A
Cited
US3137671A
Cited
US3304297A
Cited
US3108846A
Cited
US3096322A
Cited
BE645458A
Cited
US3337288A
Cited
US3345122A
Cited
US3277075A
Cited
US3563931A
Cited
US3507850A
Cited
US3640733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |