Patent US4459212A successfully refreshed from Google Patents.
US4459212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for waste encapsulation
Assignee: Dow Chemical Europe SA
•
Filing: 1982-05-10
•
Granted: 1984-07-10
•
Expires: 2002-05-10
Abstract
Abstract An improvement in the process of encapsulating aqueous liquid waste materials in liquid thermosettable resins of the group consisting of vinyl ester resins, unsaturated polyester resins, and mixtures thereof by forming an emulsion of such waste materials in said resins, which comprises increasing the amount of waste material incorporated in a given amount of resin by incorporating in the waste-resin emulsion a water-soluble salt of carboxymethyl cellulose.
Inventors
- 👤 Pietro T. Carini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:08
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/16; G21F9/167
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
In the process of encapsulating aqueous liquid wastes in liquid thermosettable resins of the group consisting of vinyl ester resins, unsaturated polyester resins and mixtures thereof, wherein the waste is emulsified in the resin, the improvement which comprises incorporating in the waste-resin emulsion a water-soluble salt of carboxymethyl cellulose in an amount sufficient to increase the amount of waste emulsified in the resin.
Claim 2
Dependent Claim
63 words
In the process of encapsulating aqueous liquid wastes in liquid thermosettable resins of the group consisting of vinyl ester resins, unsaturated polyester resins and mixtures thereof, wherein the waste is emulsified in the resin, the improvement which comprises incorporating in the waste-resin emulsion a water-soluble salt of carboxymethyl cellulose in an amount sufficient to increase the amount of waste emulsified in the resin.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the water-soluble salt of carboxymethyl cellulose has a degree of substitution ranging from about 0.65 to about 1.2.
Claim 4
Dependent Claim
24 words
The process of claim 2 wherein the carboxymethyl cellulose has a degree of substitution of about 0.7 and a molecular weight of approximately 250,000.
Claim 5
Dependent Claim
17 words
The process of claim 3 wherein the salt of the carboxymethyl cellulose employed is the sodium salt.
Claim 6
Dependent Claim
65 words
In the process of encapsulating aqueous liquid wastes in liquid thermosettable resins of the group consisting of vinyl ester resins, unsaturated polyester resins and mixtures thereof, wherein the liquid waste is emulsified in the resin, the improvement which comprises incorporating in the resin a sufficient amount of a water-soluble salt of carboxymethyl cellulose to substantially increase the amount of waste subsequently emulsified in the resin.
Claim 7
Dependent Claim
65 words
In the process of encapsulating aqueous liquid wastes in liquid thermosettable resins of the group consisting of vinyl ester resins, unsaturated polyester resins and mixtures thereof, wherein the liquid waste is emulsified in the resin, the improvement which comprises incorporating in the resin a sufficient amount of a water-soluble salt of carboxymethyl cellulose to substantially increase the amount of waste subsequently emulsified in the resin.
Claim 8
Dependent Claim
28 words
The process as defined in claim 5 wherein the salt of carboxymethyl cellulose is sodium and has a degree of substitution ranging from about 0.65 to about 1.2.
References Cited (Backward Citations)
US4077901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |