US3553306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Films and filaments having ion-exchange properties and process for making same
Assignee: Primerica Inc
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Filing: 1969-10-24
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Granted: 1971-01-05
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Expires: 1989-10-24
Abstract
Abstract FILMS AND FIBERS OR FILAMENTS HAVING ION-EXCHANGE PROPERTIES ARE MADE BY THE VISCOSE PROCESS FROM CELLULOSIC MATERIAL TO WHICH CERTAIN IONIC POLYMERS HAVE BEEN GRAFT POLYMERIZED PORTION TO THE REGENERATION OF THE CELLULOSIC MATERIAL.
Inventors
- 👤 John Armistead Church
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:00
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0002; B01D67/0009; B01D67/0011; B01D71/00; B01D71/06; B01D71/08; B01D71/10; B01D71/12; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/22; C; C08; C08F; C08F251/00; C08F251/02; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2212; D; D01; D01F; D01F11/00; D01F11/02; D01F2/00; D01F2/06; D01F2/08; D06; D06M; D06M14/00; D06M14/02; D06M14/04; B01D2323/00; B01D2323/38; C08J2301/00; Y; Y10; Y10S; Y10S623/00; Y10S623/924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |