US3697470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-alkyl-n-arylhydroxylamines as shortstopping agents and popcorn polymer inhibitors
Assignee: Pennwalt Corp
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Filing: 1969-05-21
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Granted: 1972-10-10
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Expires: 1989-05-21
Abstract
Abstract N-ALKYL-N-ARYLHDROXYLAMINE IS DISCLOSED AS A SHORTSTOPPING AGENT IN EMULSION POLYMERIZATION AND AS AN INHIBITOR OR SUPPRESSOR OF THE UNDERSIRABLE POLYMERIZATION OF OLEFINIC MONOMERS RESULTING IN THE FORMATION OF POPCORN POLYMERS.
Inventors
- 👤 Paul G Haines
- 👤 Harry Elmer Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:30
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20; C08; C08F; C08F2/00; C08F2/38; C08F36/00; C08F36/02; C08F36/04
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |