US2998329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of cellulosic articles
Assignee: Dow Chemical Co
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Filing: 1957-08-05
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Granted: 1961-08-29
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Expires: 1977-08-05
Abstract
No abstract record available.
Inventors
- 👤 Richard C Sovish
- 👤 Frank L Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:39
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/18; D06M14/20; D06M14/22; Y; Y10; Y10S; Y10S8/00; Y10S8/18; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T442/00; Y10T442/20; Y10T442/2033; Y10T442/2762; Y10T442/277; Y10T442/2779; Y10T442/2861; Y10T442/2869
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
METHOD FOR BENEFICIALLY MODIFYING SUBSTANTIALLY PURE CELLULOSIC SUBSTRATES WHICH COMPRISES FIRST CONTACTING THE SUBSTRATE WITH AN AQUEOUS SOLUTION, IN A SUBSTANTIALLY NEUTRAL PH, OF A WATER-SOLUBLE ETHYLENICALLY UNSATURATED MONOMER THAT IS POLYMERIZABLE IN AQUEOUS SOLUTION UNDER THE INFLUENCE OF A FIELD OF IONIZING HIGH ENERGY RADIATION; CONTINUING CONTACT OF SAID SUBSTRATE WITH SAID MONOMERIC SOLUTION UNTIL THE FORMER IS AT LEAST PARTIALLY SWOLLEN BY THE LATTER; THEN SUBSEQUENTLY EXPOSING THE CELLULOSIC SUBSTRATE WHILE IT IS IN CONTACT WITH THE AQUEOUS MONOMERIC SOLUTION TO A FIELD OF IONIZING HIGH ENERGY RADIATION UNTIL AT LEAST THE SURFACE OF THE SUBSTRATE HAS BECOME MODIFIED WITH THE SATURATED REACTION PRODUCT OF SAID MONOMERIC MATERIAL THAT HAS BEEN CHEMICALLY REACTED TO PROVIDE SAID REACTION PRODUCT IN THE PRESENCE OF AND IN INTIMATE ASSOCIATION WITH SAID SUBSTRATE.
Claim 2
Dependent Claim
131 words
METHOD FOR BENEFICIALLY MODIFYING SUBSTANTIALLY PURE CELLULOSIC SUBSTRATES WHICH COMPRISES FIRST CONTACTING THE SUBSTRATE WITH AN AQUEOUS SOLUTION, IN A SUBSTANTIALLY NEUTRAL PH, OF A WATER-SOLUBLE ETHYLENICALLY UNSATURATED MONOMER THAT IS POLYMERIZABLE IN AQUEOUS SOLUTION UNDER THE INFLUENCE OF A FIELD OF IONIZING HIGH ENERGY RADIATION; CONTINUING CONTACT OF SAID SUBSTRATE WITH SAID MONOMERIC SOLUTION UNTIL THE FORMER IS AT LEAST PARTIALLY SWOLLEN BY THE LATTER; THEN SUBSEQUENTLY EXPOSING THE CELLULOSIC SUBSTRATE WHILE IT IS IN CONTACT WITH THE AQUEOUS MONOMERIC SOLUTION TO A FIELD OF IONIZING HIGH ENERGY RADIATION UNTIL AT LEAST THE SURFACE OF THE SUBSTRATE HAS BECOME MODIFIED WITH THE SATURATED REACTION PRODUCT OF SAID MONOMERIC MATERIAL THAT HAS BEEN CHEMICALLY REACTED TO PROVIDE SAID REACTION PRODUCT IN THE PRESENCE OF AND IN INTIMATE ASSOCIATION WITH SAID SUBSTRATE.
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |