Patent US2526078A successfully refreshed from Google Patents.
US2526078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of preparing reaction products of epsilon-caprolactam and a nitrogenous compound
Assignee: Wyeth Holdings LLC
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Filing: 1948-04-19
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Granted: 1950-10-17
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Expires: 1968-04-19
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
- 👤 John J Padbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:53
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE METHOD WHICH COMPRISES EFFECTING REACTION AT A TEMPERATURE OF AT LEAST 110*C. BUT BELOW THE DECOMPOSITION TEMPERATURE OF THE REACTION PRODUCT BETWEEN REACTANTS CONSISTING OF (1) EPSILON-CAPROLACTAM AND (2) A COMPOUND REPRESENTED BY THE GENERAL FORMULA
Claim 2
Independent Claim
37 words
THE METHOD WHICH COMPRISES EFFECTING REACTION AT A TEMPERATURE OF AT LEAST 110*C. BUT BELOW THE DECOMPOSITION TEMPERATURE OF THE REACTION PRODUCT BETWEEN REACTANTS CONSISTING OF (1) EPSILON-CAPROLACTAM AND (2) A COMPOUND REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |