US2679494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified acrylonitrile polymerization products and method of preparation
Assignee: Wyeth Holdings LLC
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Filing: 1951-05-15
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Granted: 1954-05-25
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Expires: 1971-05-15
Abstract
No abstract record available.
Inventors
- 👤 Walter M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:03
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A COMPOSITION COMPRISING A WATER-INSOLUBLE POLYMERIC PRODUCT OF REACTION OF INGREDIENTS CONSISTING ESSENTIALLY OF (1) MONOMERIC ACRYLONITRILE, (2) AN ALDEHYDE AND (3) A NITROGENOUS SUBSTANCE SELECTED FROM THE CLASS CONSISTING OF (A) AMMONIA AND PRIMARY AND SECONDARY AMINES AND (B) ACID-ADDITION SALTS OF THE COMPOUNDS OF (A), SAID NITROGENOUS SUBSTANCE BEING FURTHER CHARACTERIZED BY BEING REACTIVE IN A MANNICH REACTION, AND SAID ACRYLONITRILE OF (1) BEING POLYMERIZED IN THE PRESENCE OF THE OTHER REACTIVE MATERIAL AND CONSISTING FROM ABOUT 80% TO ABOUT 97% BY WEIGHT OF THE TOTAL AMOUNT OF THE INGREDIENTS OF (1), (2) AND (3), AND THE INGREDIENTS OF (2) AND (3) BEING EMPLOYED IN A MOLAR RATIO OF FROM ABOUT 0.5 MOLE TO ABOUT 5 MOLES OF THE FORMER PER MOLE OF THE LATTER.
Claim 2
Dependent Claim
127 words
A COMPOSITION COMPRISING A WATER-INSOLUBLE POLYMERIC PRODUCT OF REACTION OF INGREDIENTS CONSISTING ESSENTIALLY OF (1) MONOMERIC ACRYLONITRILE, (2) AN ALDEHYDE AND (3) A NITROGENOUS SUBSTANCE SELECTED FROM THE CLASS CONSISTING OF (A) AMMONIA AND PRIMARY AND SECONDARY AMINES AND (B) ACID-ADDITION SALTS OF THE COMPOUNDS OF (A), SAID NITROGENOUS SUBSTANCE BEING FURTHER CHARACTERIZED BY BEING REACTIVE IN A MANNICH REACTION, AND SAID ACRYLONITRILE OF (1) BEING POLYMERIZED IN THE PRESENCE OF THE OTHER REACTIVE MATERIAL AND CONSISTING FROM ABOUT 80% TO ABOUT 97% BY WEIGHT OF THE TOTAL AMOUNT OF THE INGREDIENTS OF (1), (2) AND (3), AND THE INGREDIENTS OF (2) AND (3) BEING EMPLOYED IN A MOLAR RATIO OF FROM ABOUT 0.5 MOLE TO ABOUT 5 MOLES OF THE FORMER PER MOLE OF THE LATTER.
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) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |