US2723266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing amides and lactams
Assignee: Acordis UK Ltd
•
Filing: 1953-05-12
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Granted: 1955-11-08
•
Expires: 1973-05-12
Abstract
No abstract record available.
Inventors
- 👤 Lincoln James
- 👤 Cohn Irene Marianne
- 👤 Groombridge Walter Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:41
CPC Classifications
C; C07; C07D; C07D201/00; C07D201/02; C07D201/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
PROCESS OF AN AMIDE BY THE BECKMANN REARRANGEMENT OF THE CORRESPONDING OXIME, WHICH COMPRISES THE STEP OF USING A CATALYST COMPRISING A MIXTURE OF AMMONIUM BISULPHATE AND AT MOST AN EQUIMOLECULAR PROPORTION OF SULPHURIC ACID.
Claim 2
Dependent Claim
35 words
PROCESS OF AN AMIDE BY THE BECKMANN REARRANGEMENT OF THE CORRESPONDING OXIME, WHICH COMPRISES THE STEP OF USING A CATALYST COMPRISING A MIXTURE OF AMMONIUM BISULPHATE AND AT MOST AN EQUIMOLECULAR PROPORTION OF SULPHURIC ACID.
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) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |