US2856426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal decomposition of acetic acid
Assignee: Canadian Celanese Ltd
•
Filing: 1955-01-12
•
Granted: 1958-10-14
•
Expires: 1975-01-12
Abstract
No abstract record available.
Inventors
- 👤 James P Estabrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:58
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/87; C07C45/89; C07C51/00; C07C51/54; C07C51/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
PROCESS FOR THE THERMAL DECOMPOSITION OF ACETIC ACID TO PRODUCE A MEMBER OF THE GROUP CONSISITING OF ACETIC ANHYDRIDE AND KETENE, WHICH COMPRISES CARRYING OUT THE TERMAL DECOMPOSITION IN THE PRESENCE OF A LOWER ALKYL ESTER OF A SULFUR SUBSTITUTED PHOSPHORIC ACID.
Claim 2
Dependent Claim
42 words
PROCESS FOR THE THERMAL DECOMPOSITION OF ACETIC ACID TO PRODUCE A MEMBER OF THE GROUP CONSISITING OF ACETIC ANHYDRIDE AND KETENE, WHICH COMPRISES CARRYING OUT THE TERMAL DECOMPOSITION IN THE PRESENCE OF A LOWER ALKYL ESTER OF A SULFUR SUBSTITUTED PHOSPHORIC 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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |