Patent US3852341A successfully refreshed from Google Patents.
US3852341A
Expired / Lapsed
US
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Novel iodine containing polymers useful as x-ray contrast agents
Assignee: Pfizer Health AB
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Filing: 1971-04-26
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Granted: 1974-12-03
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Expires: 1991-04-26
Abstract
Abstract Polymers consisting of alternating 2,4,6-triiodobenzoic acid derivative groups and intermediate aliphatic hydroxyl group containing bridges and physiological acceptable salts thereof. These polymers are particularly useful for X-ray visibilization of body cavities.
Inventors
- 👤 B Lindberg
- 👤 L Bjork
- 👤 K Granath
- 👤 U Erikson
- 👤 B Ingelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:40
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0433; A61K49/0442; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/52; C08G73/00; C08G73/02; C08G73/026; C08G73/0266; C08G73/028
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
9 words
A POLYMER CONSISTIG OF REPEATING UNITS OF THE FORMULA
Claim 2
Dependent Claim
9 words
A POLYMER CONSISTIG OF REPEATING UNITS OF THE FORMULA
Claim 3
Dependent Claim
9 words
A polymer consisting of repeating units of the formula
Claim 4
Dependent Claim
9 words
A polymer consisting of repeating units of the formula
Claim 5
Dependent Claim
10 words
A polymer as claimed in claim 1, wherein X is
Claim 6
Dependent Claim
10 words
A polymer as claimed in claim 2, wherein X is
Claim 7
Dependent Claim
10 words
A polymer as claimed in claim 1, wherein X is
Claim 8
Dependent Claim
10 words
A polymer as claimed in claim 2, wherein X is
Claim 9
Dependent Claim
28 words
A polymer as claimed in claim 3, wherein A is a member selected from the group consisting of -CH2.CH(OH).CH2.O.CH2.CH(OH).CH2-; -CH2.CH(OH).CH2.O.CH2.CH2.O.CH2.CH(OH).CH2-; -CH2.CH(OH).CH2.O.(CH2)4.O.CH2.CH(OH).CH2-; CH2.CH(OH).CH2.O.CH2.CH(OH).CH2.O.CH2.CH(OH).CH2-; -CH2.CH(OH).CH2.O.CH2.CH(OH).CH2.O.(CH2)2. O.CH2.CH(OH).CH2. O.CH2.CH(OH).CH2-; and -CH2.CH(OH).CH2.O.CH2.CH(OH).CH2.O.(CH2)4.O.CH2CH(OH).CH2.O.CH2. CH(OH).CH2-.
Claim 10
Dependent Claim
19 words
A polymer as claimed in claim 4, wherein A is a member selected from the group consisting of CH2.CH(OH).CH2--CH2.CH(OH).CH(OH).CH2-.
Claim 11
Dependent Claim
19 words
A polymer as claimed in claim 6, wherein A is a member selected from the group consisting of -CH2.CH(OH).CH2--CH2.CH(OH).CH(OH).CH2-.
Claim 12
Dependent Claim
27 words
A polymer as claimed in claim 5, wherein A is a member selected from the group consisting of -CH2.CH(OH).CH2.O.CH2.CH(OH).CH2-; CH2.CH(OH).CH2.O.CH2.CH2.O.CH2.CH(OH).CH2-; -CH2.CH(OH).CH2.O.(CH2)4.O.CH2.CH(OH).CH2-; -CH2.CH(OH).CH2.O.CH2.CH(OH).CH2.O.CH2.CH(OH).CH2-; -CH2.CH(OH).CH2.O.CH2.CH(OH).CH2.O.(CH2)2.O.CH2.CH(OH).CH2.O.CH2 .CH(OH).CH2-; and -CH2.CH(OH).CH2.O.CH2.CH(OH).CH2.O.(CH2)4.O.CH2.CH(OH).CH2.O.CH2 .CH(OH).CH2-.
References Cited (Backward Citations)
US3574718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |