US3576877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitro-n,n-dialkyl aniline-n-oxides
Assignee: Pennwalt Corp
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Filing: 1967-11-07
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Granted: 1971-04-27
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Expires: 1987-11-07
Abstract
Abstract PROCESS OF RETARDING THE FORMATION OF POPCORN POLYMERS BY USE OF AN AROMATIC AMINE OXIDE OF STRUCTURE X-(PHENYLENE)-N(=O)(-R1)2 WHERE R1 IS LOWER ALKYL, HYDROXY SUBSTITUTED LOWER ALKYL, OR A GROUP OF STRUCTURE (2-(HO-),R2,R3-PHENYL)-CH2- WHERE R2 IS HYDROGEN OR LOWER ALKYL, AND R3 IS A TERTIARY ALKYL GROUP, X IS HYDROGEN, HALOGEN, NITRO OR LOWER ALKYL, AND WITH THE PROVISO THAT THE TOTAL NUMBER OF CARBON ATOMS IN THE R1 GROUPS BE AT LEAST FOUR.
Inventors
- 👤 Harry Elmer Albert
- 👤 Paul Gordon Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:14
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C07; C07C; C07C291/00; C07C291/02; C07C291/04; C07C7/00; C07C7/20; C08F2/00; C08F2/38
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |