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US3671468A Expired / Lapsed US ⏱️ 0.0 years remaining

Polymers and process for preparing the same

Assignee: Chugai Pharmaceutical Co Ltd
•
Filing: 1970-09-03
•
Granted: 1972-06-20
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Expires: 1990-09-03
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Abstract

Abstract Novel polymers represented by the formula WHERE A and B are each selected from the group consisting of a straight and branched alkylene, a straight and branched alkylene containing, as a part thereof, a double bond, a triple bond or a radical -(CH2CH2O)y-CH2-CH2-wherein y is an integer of from 1 to 20, xylylene and cyclohexylene; R1, R2, R3 and R4 represent a lower alkyl group, or R1 and R2, and/or R3 and R4, when taken together with the nitrogen atoms to which they are attached, may form heterocyclic rings; and X represents a halogen atom, which are useful for pharmaceutical preparations and useful as a coagulating or flocculating agent for clarifying crude water in the reservoir for water supply, industrial water and sewage or drainage water are disclosed. The polymers are prepared by reacting a compound represented by the formula WHEREIN R1, R2, R3, R4 and A are as defined above, with a compound represented by the formula WHEREIN B and X are as defined above.

Inventors

  • 👤 Minoru Tsuda
  • 👤 Akio Yosida
  • 👤 Takamitsu Yuki

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 18:32
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C02; C02F; C02F1/00; C02F1/52; C02F1/54

Claims Analysis

Total Claims: 18
Claim 1
Independent Claim 12 words
A novel polymer in accordance with claim 1, represented by the formula
Claim 2
Dependent Claim 12 words
A novel polymer in accordance with claim 1, represented by the formula
Claim 3
Dependent Claim 12 words
A novel polymer in accordance with claim 1, represented by the formula
Claim 4
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 5
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 6
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 7
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 8
Dependent Claim 12 words
A novel polymer in accordance with claim 1, represented by the formula
Claim 9
Dependent Claim 12 words
A novel polymer in accordance with claim 1, represented by the formula
Claim 10
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 11
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 12
Dependent Claim 12 words
A novel polymer in aCcordance with claim 1 represented by the formula
Claim 13
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 14
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 15
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 16
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 17
Dependent Claim 12 words
A novel polymer in accordance with claim 1 represented by the formula
Claim 18
Dependent Claim 33 words
A clarifying agent for crude water in the reservoir for water supply, industrial water or turbid sewage or drainage water which comprises a polymer represented by the formula in accordance with claim 1.

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) 1975-06-20 1975-12-20 1976-06-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-06-20 1979-12-20 1980-06-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-06-20 1983-12-20 1984-06-20 $7700.00 Window Closed / Lapsed

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