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US3840504A Expired / Lapsed US ⏱️ 0.0 years remaining

Reaction products of epihalohydrin and polymers of diallylamine and their use in paper

Assignee: Hercules LLC
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Filing: 1972-03-14
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Granted: 1974-10-08
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Expires: 1992-03-14
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Abstract

Abstract WHERE R IS HYDROGEN OR LOWER ALKYL AND R'' IS HYDROGEN, ALKYL OR A SUBSTITUTED ALKYL GROUP WHEREIN THE SUBSTITUENT IS A GROUP WHICH WILL NOT INTERFERE WITH POLYMERIZATION THROUGH A VINYL DOUBLE BOND AND IS SELECTED FROM THE GROUP CONSISTING OF CARBOXYLATE, CYANO, ETHER, AMINO, AMINE, HYDRAZIDE AND HYDROXYL GROUPS AND UNNITS OF SULFUR DIOXIDE AND (B) FROM ABOUT 0.5 TO ABOUT 1.5 MOLES OF AN EPIHALOHYDRIM PER MOLE OF SECONDARY PLUS TERTIARY AMINE PERCENT IN SAID POLYMER, SAID PRODUCT BEING FORMED AT A TEMPERATURE OF FROM ABOUT 30* TO ABOUT 80*C, AND A PH OF FROM ABOUT 7 TO ABOUT 9.5. -CH2-(1-R'',3,5-DI(R-)-PIPERIDIN-3,5-YLENE)- 1. A WATER-SOLUBLE RESINOUS REACTION PRODUCT OF (A) A LINEAR POLYMER COMPRISING UNITS OF THE FORMULA

Inventors

  • 👤 G Keim

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 10:35
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455; C; C08; C08F; C08F8/00; D21H17/38

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 15 words
A WATER-SOLUBLE RESINOUS REACTION PRODUCT OF (A) A LINEAR POLYMER COMPRISING UNITS OF THE FORMULA
Claim 2
Dependent Claim 15 words
A WATER-SOLUBLE RESINOUS REACTION PRODUCT OF (A) A LINEAR POLYMER COMPRISING UNITS OF THE FORMULA

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) 1977-10-07 1978-04-08 1978-10-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-07 1982-04-08 1982-10-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-07 1986-04-08 1986-10-08 $7700.00 Window Closed / Lapsed

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