US3245935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing aqueous dispersions of chlorosulfonated polyethylene
Assignee: EIDP Inc
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Filing: 1961-07-18
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Granted: 1966-04-12
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Expires: 1981-07-18
Abstract
No abstract record available.
Inventors
- 👤 Ii Chester Arthur Hargreaves
- 👤 Nersasian Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:50
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; C08F; C08F8/00; C08F8/44; C08J2323/00; C08J2323/26; C08J2323/32; C08J2323/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR PREPARING AN AQUEOUS DISPERSION WHICH COMPRISES DISSOLVING IN TETRAHYDROFURAN A SALT OF A POLYETHYLENE SULFONIX ACID DERIVED BY HYDROLYSIS FROM A CHLOROSULFONATED POLYETHLENE CONTAINING 0.5 TO 1.8% BY WEIGHT SULFUR AND 10 TO 48% BY WEIGHT CHLORINE, THE CATIONIC CONSTITUENT OF SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, POTASSIUM, AMMONIUM AND SUBSTITUTED AMMONIUM, ADDING IN AT LEAST ONE INCREMENT, WATER, AND A PREICPITANT COMPOUND MISCRIBLE WITH AND MORE VOLATILE THAN WATER SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, ISOPROPANOL AND ACETONE IN AN AMOUNT TO FORM AN OPALESCENCE BUT LESS THAN THAT REQUIRED TO FORM A PRECIPITATE, AND DISTILLING OFF SAID SOLVENT AND SAID PRECIPITANT COMPOUND TO FORM AN AQUEOUS DISPERSION.
Claim 2
Dependent Claim
119 words
A PROCESS FOR PREPARING AN AQUEOUS DISPERSION WHICH COMPRISES DISSOLVING IN TETRAHYDROFURAN A SALT OF A POLYETHYLENE SULFONIX ACID DERIVED BY HYDROLYSIS FROM A CHLOROSULFONATED POLYETHLENE CONTAINING 0.5 TO 1.8% BY WEIGHT SULFUR AND 10 TO 48% BY WEIGHT CHLORINE, THE CATIONIC CONSTITUENT OF SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, POTASSIUM, AMMONIUM AND SUBSTITUTED AMMONIUM, ADDING IN AT LEAST ONE INCREMENT, WATER, AND A PREICPITANT COMPOUND MISCRIBLE WITH AND MORE VOLATILE THAN WATER SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, ISOPROPANOL AND ACETONE IN AN AMOUNT TO FORM AN OPALESCENCE BUT LESS THAN THAT REQUIRED TO FORM A PRECIPITATE, AND DISTILLING OFF SAID SOLVENT AND SAID PRECIPITANT COMPOUND TO FORM AN AQUEOUS DISPERSION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |