Patent US5626862A successfully refreshed from Google Patents.
Patent US2849446A successfully refreshed from Google Patents.
US2849446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Caprolactam containing 2, 6-di-tert.-butyl-p-cresol
Assignee: EIDP Inc
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Filing: 1954-05-27
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Granted: 1958-08-26
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:30
CPC Classifications
C; C07; C07D; C07D201/00; C07D201/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A CAPROLACTRM COMPOSITION SUITABLE FOR POLYMERIZATION CONSISTING ESSENTIALLY OF CAPROLACTAM AND FROM 0.01 TO 1% BY WEIGHT OF 2,6-DI-TERT-BUTYL-P-CRESOL.
Claim 2
Dependent Claim
19 words
A CAPROLACTRM COMPOSITION SUITABLE FOR POLYMERIZATION CONSISTING ESSENTIALLY OF CAPROLACTAM AND FROM 0.01 TO 1% BY WEIGHT OF 2,6-DI-TERT-BUTYL-P-CRESOL.
References Cited (Backward Citations)
US2241321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |