Patent US3560424A successfully refreshed from Google Patents.
US3560424A
Expired / Lapsed
US
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Shrink-proofing process
Assignee: Amicon Corp
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Filing: 1968-07-22
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Granted: 1971-02-02
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Expires: 1988-07-22
Abstract
Abstract A NOVEL PROCESS, AND THE NOVEL PRODUCTS PRODUCED THEREBY, WHEREIN HYDROGELS OF THE TYPE HAVING NOT MORE THAN VERY LIMITED COVALENT CROSS LINKING-AND MOST ADVANTEGEOUSLY NO COVALENT CROSS-LINKING AT ALL-ARE TREATED WITH CERIC ION SOLUTION IN AN ACID MEDIUM, AND THEREBY MADE SHRINK RESISTANT. THE PROCESS IS MOST SUITABLE FOR USE IN SHRINK-PROOFING IONICALLY-CROSSLINKED MATERIALS LIKE POLYELECTROLYTE COMPLEX RESINS.
Inventors
- 👤 John H Glaser
- 👤 Basil Yankopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:09
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |