US3629082A
Expired / Lapsed
US
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Process for producing homogeneous polymeric cation-exchange materials
Assignee: Individual
•
Filing: 1969-04-22
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Granted: 1971-12-21
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Expires: 1989-04-22
Abstract
Abstract A process for producing homogeneous polymeric cation-exchange materials from a solution or a melt of a copolymer of 2.8 moles of sodium ethylenesulfonate and 2.4 moles of acrylic acid, followed by treatment with fast electrons at a dose rate of 0.2 to 0.7 Mrad per second for a period of 2 to 5 minutes.
Inventors
- 👤 Valentin Alexeevich Kargin
- 👤 Elena Pavlovna Cherneva
- 👤 Tatyana Danilovna Ignatovich
- 👤 Nikolai Nikolaevich Tunitsky
- 👤 Tatyana Nikolaevna Toroptseva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:59
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; B; B01; B01J; B01J47/00; B01J47/016; C08J2323/00; C08J2323/02; C08J2323/04; C08J2333/00; C08J2333/04; C08J2333/06; C08J2333/10; Y; Y10; Y10S; Y10S522/00; Y10S522/911; Y10S522/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A process as defined in claim 1, wherein the cation-exchange materials are treated with a saturated solution of salts of thorium or zirconium after being subjected to the action of fast electrons.
Claim 2
Dependent Claim
31 words
A process as claimed in claim 2, wherein the cation-exchange materials are treated with a solution of a mineral acid after being treated with solutions of salts of thorium or zirconium.
References Cited (Backward Citations)
SU185052A1
Cited
US3188165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |