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Patent US3036046A successfully refreshed from Google Patents.
US3036046A
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US
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Polymerization of pyrrolidone and piperidone employing n, n-disubstituted urethanes as chain initiators
Assignee: GAF Chemicals Corp
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Filing: 1958-04-04
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Granted: 1962-05-22
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Expires: 1978-04-04
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Glickman
- 👤 Miller Edgar Shelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:16
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
IN THE PROCESS OF POLYMERIZING LACTAMS OF THE FORMULA:
Claim 2
Dependent Claim
9 words
IN THE PROCESS OF POLYMERIZING LACTAMS OF THE FORMULA:
References Cited (Backward Citations)
DE889693C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |