Patent US3265751A successfully refreshed from Google Patents.
US3265751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting popcorn polymer formation
Assignee: Pennwalt Corp
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Filing: 1964-12-17
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Granted: 1966-08-09
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Expires: 1984-12-17
Abstract
No abstract record available.
Inventors
- 👤 Mccoy George
- 👤 Whiton Alfred Case
- 👤 Haines Paul Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:44
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
THE PROCESS OF INHIBITING THE FORMATION OF POPCORN POLYMERS IN OLEFIN MONOMER RECOVERY SYSTEMS WHICH COMPRISES CONTACTING SAID MONOMER WITH AN INHIBITING AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF N-HYDROXYMORPHOLINE AND N-HYDROXYPIPERIDINE.
Claim 2
Dependent Claim
35 words
THE PROCESS OF INHIBITING THE FORMATION OF POPCORN POLYMERS IN OLEFIN MONOMER RECOVERY SYSTEMS WHICH COMPRISES CONTACTING SAID MONOMER WITH AN INHIBITING AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF N-HYDROXYMORPHOLINE AND N-HYDROXYPIPERIDINE.
References Cited (Backward Citations)
US3148225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |