US2783269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of acrylonitrile
Assignee: Wyeth Holdings LLC
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Filing: 1955-03-30
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Granted: 1957-02-26
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Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 Bellis Maurice Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:45
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/38; C07; C07C; C07C253/00; C07C253/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A METHOD OF INHIBITING THE POLYMERIZATION OF ACRYLONITRILE WITHOUT DISCOLORATION WHICH COMPRISES INCORPORATING THEREIN AT LEAST 0.5 PART PER MILLION OF AT LEAST ONE COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
28 words
A METHOD OF INHIBITING THE POLYMERIZATION OF ACRYLONITRILE WITHOUT DISCOLORATION WHICH COMPRISES INCORPORATING THEREIN AT LEAST 0.5 PART PER MILLION OF AT LEAST ONE COMPOUND HAVING THE FORMULA
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) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |