US4693728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocolloid blend for controlled release of calcium ions
Assignee: Solutia Inc
•
Filing: 1985-08-27
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Granted: 1987-09-15
•
Expires: 2005-08-27
Abstract
Abstract Hydrocolloid/salt blends are prepared which controllably release ions into solution. The blends are especially useful in alginate print paste compositions.
Inventors
- 👤 Kenneth Clare
- 👤 William Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:44
CPC Classifications
C; C09; C09B; C09B65/00; D; D06; D06P; D06P5/00; D06P5/001; A; A23; A23K; A23K20/00; A23K20/10; A23K20/163; A23K50/00; A23K50/40; A23K50/48; A23L; A23L29/00; A23L29/20; A23L29/206; A23L9/00; A23L9/10; C08; C08L; C08L5/00; C08L5/04; D06P1/00; D06P1/44; D06P1/46; D06P1/48
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
Blend of ( 2) a hydrocolloid selected from the group consisting of guar, oxidized guar, carboxymethyl guar, hydroxyalkyl guar, polyvinyl alcohol, carboxymethyl cellulose, xanthan gum, cold water soluble locust bean gum, cold water soluble starch, hydroxyethylated starch, and hydroxypropylated starch and (2) a calcium, barium, or strontium salt wherein the ratio by weight of salt to hydrocolloid ranges from 10:1 to 1:20.
Claim 2
Dependent Claim
62 words
Blend of ( 2) a hydrocolloid selected from the group consisting of guar, oxidized guar, carboxymethyl guar, hydroxyalkyl guar, polyvinyl alcohol, carboxymethyl cellulose, xanthan gum, cold water soluble locust bean gum, cold water soluble starch, hydroxyethylated starch, and hydroxypropylated starch and (2) a calcium, barium, or strontium salt wherein the ratio by weight of salt to hydrocolloid ranges from 10:1 to 1:20.
Claim 3
Dependent Claim
27 words
A blend of claim 1 wherein the hydrocolloid is guar, oxidized guar, carboxymethyl guar, hydroxyalkyl guar, carboxymethylcellulose, or xanthan gum, and the salt is a calcium salt.
Claim 4
Dependent Claim
17 words
A blend of claim 2 wherein the guar is hydroxyethyl guar and the salt is calcium citrate.
Claim 5
Dependent Claim
36 words
A blend of claim 1 prepared by a process which comprises mixing in water said hydrocolloid and said salt to form a paste, drying said paste to about 90% solids, and then milling said dried paste.
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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) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |