US2855436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of substituted acrylic acid amides
Assignee: Koninklijke Pharmaceutische Fabrieken NV
•
Filing: 1955-01-10
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Granted: 1958-10-07
•
Expires: 1975-01-10
Abstract
No abstract record available.
Inventors
- 👤 Rekker Roelof Feike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:16
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
PROCESS FOR THE PREPARATION OF AN UNSATURATED ACID AMIDE HAVING THE FORMULA
Claim 2
Dependent Claim
12 words
PROCESS FOR THE PREPARATION OF AN UNSATURATED ACID AMIDE HAVING THE FORMULA
References Cited (Backward Citations)
US2417748A
Cited
US2447822A
Cited
US2494583A
Cited
US2476559A
Cited
US2451436A
Cited
US2508279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |