US3248440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization inhibitor
Assignee: Pennwalt Corp
•
Filing: 1963-10-30
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Granted: 1966-04-26
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Expires: 1983-10-30
Abstract
No abstract record available.
Inventors
- 👤 Albert Harry Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:24
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/38; C07; C07C; C07C7/00; C07C7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE PROCESS OF STABILIZING AN AROMATIC VINYL COMPOUND AGAINST POLYMERIZATION WHICH COMPRISES INCORPORATING IN SAID VINYL COMPOUND A POLYMERIZATION INHIBITING AMOUNTS OF AN N,N-DI-LOWER ALKYLHYDROXYLAMINE SALT WHEREIN SAID SALT IS DERIVED FROM AN ALIPHATIC ACID CONTAINING FROM TWO TO EIGHTEEN CARBON ATOMS.
Claim 2
Dependent Claim
42 words
THE PROCESS OF STABILIZING AN AROMATIC VINYL COMPOUND AGAINST POLYMERIZATION WHICH COMPRISES INCORPORATING IN SAID VINYL COMPOUND A POLYMERIZATION INHIBITING AMOUNTS OF AN N,N-DI-LOWER ALKYLHYDROXYLAMINE SALT WHEREIN SAID SALT IS DERIVED FROM AN ALIPHATIC ACID CONTAINING FROM TWO TO EIGHTEEN CARBON ATOMS.
References Cited (Backward Citations)
US2830033A
Cited
US2965685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |