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US4217429A Expired / Lapsed US ⏱️ 0.0 years remaining

Poly-[(methylimino)trimethylene]

Assignee: Merck and Co Inc
•
Filing: 1979-04-11
•
Granted: 1980-08-12
•
Expires: 1999-04-11
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Abstract

Abstract Novel polymers having a linear backbone which is free from both branching and cross-linking, comprising quaternized nitrogen atoms linked to each other through trimethylene groups. By the term "linear backbone" is meant that the polymer has only acyclic groups, i.e. trimethylene, linking the nitrogen atoms in a single continuous chain; the polymer is free from "branching" when it has no repeating monomer units extending from the polymer backbone; and it is free from "cross-linking" when there is no joining of two linear backbones. These polymers are useful as antimicrobials, flocculating agents, antistatic agents, electroconductive agents for coating paper, chelating agents and bile acid binding agents, as well as in similar applications where their high charge to weight ratio and fully accessible nitrogen atoms can be employed. The polymers are obtained by the polymerization of dihydro-oxazine, reductive alkylation of the resulting polymer, followed by quaternization.

Inventors

  • 👤 Arthur F. Wagner
  • 👤 Nathaniel Grier
  • 👤 Tsung-Ying Shen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 06:47
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/04; C07D265/06; C07D265/08; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/0226; C08G73/0233

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 50 words
A linear unbranched non-cross-linked polymer of the formula: ##STR19## wherein n is an integer such that the number average, molecular weight is from 300-50,000, m and m' are independently 0 or 1, T 1 and T 2 are end groups, and Z - is a monovalent or polyvalent counter anion.
Claim 2
Dependent Claim 50 words
A linear unbranched non-cross-linked polymer of the formula: ##STR19## wherein n is an integer such that the number average, molecular weight is from 300-50,000, m and m' are independently 0 or 1, T 1 and T 2 are end groups, and Z - is a monovalent or polyvalent counter anion.
Claim 3
Dependent Claim 8 words
A polymer of claim 1 which is poly-[(methylimino)trimethylene].

References Cited (Backward Citations)

US2884057A Cited
US3234150A Cited
US3210299A Cited
US3372129A Cited
US3370048A Cited
US3632507A Cited
SU396351A1 Cited
US4027009A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1983-08-12 1984-02-11 1984-08-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1987-08-12 1988-02-11 1988-08-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1991-08-12 1992-02-11 1992-08-12 $7700.00 Window Closed / Lapsed

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