US3282874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for dissolving watersoluble polymers
Assignee: Dow Chemical Co
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Filing: 1963-12-30
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Granted: 1966-11-01
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Expires: 1983-12-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Friedrich
- 👤 Rex G Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:20
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2300/00; C08J2300/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR DISSOLVING A FINELY DIVIDED, SOLID, WATER-SOLUBLE ORGANIC POLYMER IN WATER WHICH COMPRISES THE STEPS OF DISPERSION OF THE PREFORMED ORGANIC POLYMER IN AN INERT, WATER-IMMISCIBLE, ORGANIC LIQUID WHICH IS A NON-SOLVENT FOR THE POLYMER AND MIXING WATER WITH THE ORGANIC LIQUID-POLYMER DISPERSION IN THE FORM OF A SUSPENSION OF THE WATER IN A SECOND BODY OF AN INERT, WATERIMMISCIBLE, ORGANIC LIQUID, WHICH IS A NON-SOLVENT FOR THE POLYMER AND WHICH SECOND BODY OF ORGANIC LIQUID IS FURTHER CHARACTERIZED BY SOLUBILITY IN THE ORGANIC LIQUIDPOLYMER DISPERSION, THE AMOUNT OF SAID WATER BEING SUFFICIENT TO PROVIDE AN AQUEOUS POLYMER SOLUTION OF A PREDETERMINED CONCENTRATION.
Claim 2
Dependent Claim
105 words
A PROCESS FOR DISSOLVING A FINELY DIVIDED, SOLID, WATER-SOLUBLE ORGANIC POLYMER IN WATER WHICH COMPRISES THE STEPS OF DISPERSION OF THE PREFORMED ORGANIC POLYMER IN AN INERT, WATER-IMMISCIBLE, ORGANIC LIQUID WHICH IS A NON-SOLVENT FOR THE POLYMER AND MIXING WATER WITH THE ORGANIC LIQUID-POLYMER DISPERSION IN THE FORM OF A SUSPENSION OF THE WATER IN A SECOND BODY OF AN INERT, WATERIMMISCIBLE, ORGANIC LIQUID, WHICH IS A NON-SOLVENT FOR THE POLYMER AND WHICH SECOND BODY OF ORGANIC LIQUID IS FURTHER CHARACTERIZED BY SOLUBILITY IN THE ORGANIC LIQUIDPOLYMER DISPERSION, THE AMOUNT OF SAID WATER BEING SUFFICIENT TO PROVIDE AN AQUEOUS POLYMER SOLUTION OF A PREDETERMINED CONCENTRATION.
References Cited (Backward Citations)
US2757153A
Cited
US2837122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |