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(12) Patent: | (11) CA 1244997 |
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(21) Application Number: | 517032 |
(54) English Title: | ACRYLIC ACID/2-ACRYLAMIDO-2-METHYLPROPYL-SULFONIC ACID/2-ACRYLAMIDO-2-METHYLPROPYL PHOSPHONIC POLYMERS |
(54) French Title: | POLYMERES D'ACIDE ACRYLIQUE, D'ACIDE 2-ACRYLAMIDO- 2-METHYLPROPYL-SULFONIQUE ET D'ACIDE 2-ACRYLAMIDO-2- METHYLPROPYL-PHOSPHONIQUE |
Status: | Expired |
(52) Canadian Patent Classification (CPC): |
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(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : | |
(74) Agent: | GOUDREAU GAGE DUBUC |
(74) Associate agent: | |
(45) Issued: | 1988-11-15 |
(22) Filed Date: | 1986-08-28 |
Availability of licence: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | ||||||
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TITLE OF THE INVENTION
ACRYLIC ACID/2-ACRYLAMIDO-2-METHYLPROPYL-
SULFONIC ACID/2-ACRYLAMIDO-2-METHYLPROPYL PHOSPHONIC
POLYMERS
ABSTRACT OF THE DISCLOSURE
The present invention is directed to a
polymer, having an intrinsic viscosity of 0.05 to 4.5
dl/g, in 1.0 M NaCl, prepared from:
(A) 35 to 65%, by weight, of acrylic acid or
methacrylic acid;
(B) 15 to 45%, by weight, of 2-acrylamido-2-methyl-
propylsulfonic acid or 2-methacrylamido-2-methyl-
propylsulfonic acid; and
(C) 15 to 25%, by weight, of 2-acrylamido-2-methyl-
propyl phosphonic acid or 2-methacrylamido-2-
methylpropylphosphonic acid.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 1244997 was not found.
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Title | Date |
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Forecasted Issue Date | 1988-11-15 |
(22) Filed | 1986-08-28 |
(45) Issued | 1988-11-15 |
Expired | 2006-08-28 |
There is no abandonment history.
Fee Type | Anniversary Year | Due Date | Amount Paid | Paid Date |
---|---|---|---|---|
Application Fee | $0.00 | 1986-08-28 | ||
Registration of a document - section 124 | $0.00 | 1999-04-28 | ||
Registration of a document - section 124 | $0.00 | 1999-04-28 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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CALGON CORPORATION |
Past Owners on Record |
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CALGON CORPORATION |
ECC SPECIALTY CHEMICALS INC. |