US3348997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl alochol, alkyleneimine, epichlorohydrin condensation product and method offorming cellulosic webs therewith
Assignee: Chemirad Corp
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Filing: 1966-06-29
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Granted: 1967-10-24
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Expires: 1986-06-29
Abstract
No abstract record available.
Inventors
- 👤 Lagally Paul
- 👤 John W Brook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:32
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/36; C; C08; C08F; C08F8/00; C08G; C08G59/00; C08G59/02; C08G59/10; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4042; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; D06; D06M; D06M13/00; D06M13/322; D06M13/325; D06M13/332; D06M15/00; D06M15/19; D06M15/21; D06M15/327; D06M15/333; D06M15/37; D06M15/55
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
A WATER-SOLUBLE CONDENSATION PRODUCT OF POLYVINYL ALCOHOL, ALKYLENIMINE, AND EPICHLOROHYDRIN WHEREIN THE MOLAR RATIO OF SAID POLYVINYL ALCOHOL TO SAID ALKYLENIMINE TO SAID EPICHLOROHYDRIN IS IN THE RANGE OF FROM 1:1:0.8 TO 1:4:8.
Claim 2
Dependent Claim
33 words
A WATER-SOLUBLE CONDENSATION PRODUCT OF POLYVINYL ALCOHOL, ALKYLENIMINE, AND EPICHLOROHYDRIN WHEREIN THE MOLAR RATIO OF SAID POLYVINYL ALCOHOL TO SAID ALKYLENIMINE TO SAID EPICHLOROHYDRIN IS IN THE RANGE OF FROM 1:1:0.8 TO 1:4:8.
Claim 3
Dependent Claim
72 words
IN A PROCESS OF IMPROVING THE PROPERTIES OF CELLULOSIC SHEET MATERIAL, THE STEPS WHICH COMPRISE ADDING TO AN AQUEOUS CELLULOSIC FIBER PULP A CONDENSATION PRODUCT OF POLYVINYL ALCOHOL, ALKYLENIMINE, AND EPICHLOROHYDRIN, WHEREIN THE MOLAR RATIO OF SAID POLYVINYL ALCOHOL TO SAID ALKYLENIMINE TO SAID EPICHLOROHYDRIN IS IN THE RANGE OF FROM 1:1:0.8 TO 1:4:8, FORMING THE CELLULOSIC SHEET MATERIAL FROM THE THUS TREATED CELLULOSIC FIBER PULP, AND CURING THE RESULTING SHEET MATERIAL.
Claim 4
Dependent Claim
72 words
IN A PROCESS OF IMPROVING THE PROPERTIES OF CELLULOSIC SHEET MATERIAL, THE STEPS WHICH COMPRISE ADDING TO AN AQUEOUS CELLULOSIC FIBER PULP A CONDENSATION PRODUCT OF POLYVINYL ALCOHOL, ALKYLENIMINE, AND EPICHLOROHYDRIN, WHEREIN THE MOLAR RATIO OF SAID POLYVINYL ALCOHOL TO SAID ALKYLENIMINE TO SAID EPICHLOROHYDRIN IS IN THE RANGE OF FROM 1:1:0.8 TO 1:4:8, FORMING THE CELLULOSIC SHEET MATERIAL FROM THE THUS TREATED CELLULOSIC FIBER PULP, AND CURING THE RESULTING SHEET MATERIAL.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |