Patent US3435009A successfully refreshed from Google Patents.
US3435009A
Expired / Lapsed
US
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Derivatives of anionic linear copolymers
Assignee: Diamond Shamrock Corp
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Filing: 1966-10-24
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Granted: 1969-03-25
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Expires: 1986-10-24
Abstract
No abstract record available.
Inventors
- 👤 Lucien Sellet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:38
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56; C08F22/00; C08F8/00; C08F8/12; C08F8/44; C08G; C08G12/00; C08G12/02; C08G12/46; C08G73/00; C08L; C08L35/00; C08L61/00; C08L61/20; C14; C14C; C14C11/00; C14C11/003; C14C3/00; C14C3/02; C14C3/08; C14C3/22; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; C08F2800/00; C08F2800/10; Y; Y10; Y10S; Y10S525/00; Y10S525/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
CONDENSATES OF MOLAR PROPORTIONS OF (A) DICYANDIAMIDE, AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE FREE ACID FORM OF, THE PARTIALLY NEUTRALIZED AMMONIUM SALT FORM OF AND THE PARTIALLY NEUTRALIZED ALKALI METAL SALT FORM OF WATER-SOLUBLE ANIONIC LINEAR COPOLYMERS, SAID COPLYMERS CONTAINING APPROXIMATELY EQUIMOLAR AMOUNTS OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF MALEIC ANHYDRIDE, MALEIC ACID AND ITACONIC ACID AND AT LEAST ONE OTHER ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE THEREWITH WITH THE PROVISO THAT WHEN SAID COPOLYMERS CONTAIN ACRYLAMIDE COPOLYMERIZED WITH A COMONOMER SELECTED FROM A GROUP CONSISTING OF ITACONIC ACID AND SALTS OF ITACONIC ACID, THERE ARE FROM 1 TO 3 MOLES OF ACRYLAMIDE PER MOLE OF SAID MONOMER.
Claim 2
Dependent Claim
115 words
CONDENSATES OF MOLAR PROPORTIONS OF (A) DICYANDIAMIDE, AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE FREE ACID FORM OF, THE PARTIALLY NEUTRALIZED AMMONIUM SALT FORM OF AND THE PARTIALLY NEUTRALIZED ALKALI METAL SALT FORM OF WATER-SOLUBLE ANIONIC LINEAR COPOLYMERS, SAID COPLYMERS CONTAINING APPROXIMATELY EQUIMOLAR AMOUNTS OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF MALEIC ANHYDRIDE, MALEIC ACID AND ITACONIC ACID AND AT LEAST ONE OTHER ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE THEREWITH WITH THE PROVISO THAT WHEN SAID COPOLYMERS CONTAIN ACRYLAMIDE COPOLYMERIZED WITH A COMONOMER SELECTED FROM A GROUP CONSISTING OF ITACONIC ACID AND SALTS OF ITACONIC ACID, THERE ARE FROM 1 TO 3 MOLES OF ACRYLAMIDE PER MOLE OF SAID MONOMER.
References Cited (Backward Citations)
US2870122A
Cited
US2891932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |