Patent US2957840A successfully refreshed from Google Patents.
US2957840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising an acrylonitrile polymer and tri-n-propanolamine borate
Assignee: Wyeth Holdings LLC
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Filing: 1957-10-28
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Granted: 1960-10-25
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Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Groszos
- 👤 Nancy E Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A COMPOSITION OF MATTER COMPRISING (1) TRI-N-PROPANOLAMINE BORATE AND (2) A POLYMERIZATION PRODUCT HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 25,000 TO ABOUT 300,000 AND BEING SELECTED FROM THE CLASS CONSISTING OF (A) A HOMOPOLYMER OF ACRYLONITRILE AND (B) COPOLYMERS OF ARCYLONITRILE AND A DIFFERENT, COPOLYMERIZABLE, MONOOLEFINIC MONOMER, SAID COPOLYMERS CONTAINING IN THE MOLECULRE THEREOF AN AVERAGE OF AT LEAST 75% BY WEIGHT OF ACRYLONITRILE AND THE REMAINDER BEING THE SAID, DIFFERENT, MONOOLEFINIC MONOMER.
Claim 2
Dependent Claim
74 words
A COMPOSITION OF MATTER COMPRISING (1) TRI-N-PROPANOLAMINE BORATE AND (2) A POLYMERIZATION PRODUCT HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 25,000 TO ABOUT 300,000 AND BEING SELECTED FROM THE CLASS CONSISTING OF (A) A HOMOPOLYMER OF ACRYLONITRILE AND (B) COPOLYMERS OF ARCYLONITRILE AND A DIFFERENT, COPOLYMERIZABLE, MONOOLEFINIC MONOMER, SAID COPOLYMERS CONTAINING IN THE MOLECULRE THEREOF AN AVERAGE OF AT LEAST 75% BY WEIGHT OF ACRYLONITRILE AND THE REMAINDER BEING THE SAID, DIFFERENT, MONOOLEFINIC MONOMER.
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |