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US2742501A
Expired / Lapsed
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Method of producing alkylidene bis-amides
Assignee: Glanzstoff AG
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Filing: 1954-10-07
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Granted: 1956-04-17
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Expires: 1974-10-07
Abstract
No abstract record available.
Inventors
- 👤 Kleine Johannes
- 👤 Heisenberg Erwin
- 👤 Lotz Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:04
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
9 words
THE METHOD OF PREPARING BIS-AMIDES HAVING THE GENERAL FORMULA
Claim 2
Independent Claim
9 words
THE METHOD OF PREPARING BIS-AMIDES HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
10 words
THE METHOD OF CLAIM 1, WHEREIN THE ALDEHYDE IS BENZALDEHYDE.
References Cited (Backward Citations)
US2270520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |