US3428617A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic hydroxy-containing polymers,preparation and use
Assignee: Shell USA Inc
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Filing: 1964-10-19
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Granted: 1969-02-18
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Expires: 1984-10-19
Abstract
No abstract record available.
Inventors
- 👤 Igor Sobolev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:23
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A CATIONIC HYDROXY-CONTAINING HOMOPOLYMER OF AN ESTER OF AN ALKENOIC ACID CONTAINING FROM 3 TO 6 CARBON ATOMS AND GLYCIDYL TRIALKYLAMMONIUM CHLORIDE WHEREIN EACH OF THE ALKYL RADICALS CONTAINS FROM 1 TO 12 CARBON ATOMS, SAID CATIONIC HYDROXY-CONTAINING POLYMER HAVING AN INTRINSIC VISOSITY RANGING FROM 0.3 DL./G. TO 5.0 DL./G. AS DETERMINED IN 0.5 M NACL AT 25*C.
Claim 2
Dependent Claim
58 words
A CATIONIC HYDROXY-CONTAINING HOMOPOLYMER OF AN ESTER OF AN ALKENOIC ACID CONTAINING FROM 3 TO 6 CARBON ATOMS AND GLYCIDYL TRIALKYLAMMONIUM CHLORIDE WHEREIN EACH OF THE ALKYL RADICALS CONTAINS FROM 1 TO 12 CARBON ATOMS, SAID CATIONIC HYDROXY-CONTAINING POLYMER HAVING AN INTRINSIC VISOSITY RANGING FROM 0.3 DL./G. TO 5.0 DL./G. AS DETERMINED IN 0.5 M NACL AT 25*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |