US2586812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc acetate on devolatilized coal
Assignee: Monsanto Chemicals Ltd
•
Filing: 1949-03-29
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Granted: 1952-02-26
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Expires: 1969-03-29
Abstract
No abstract record available.
Inventors
- 👤 Willard H Gehrke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:14
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/20; B01J27/22; C; C07; C07C; C07C67/00; C07C67/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A CATALYTIC MATERIAL SUITABLE FOR THE CATALYTIC VINYLATION OF ACETIC ACID TO VINYL ACETATE ESSENTIALLY COMPRISING 20% TO 35% BY WEIGHT OF ZINC ACETATE UPON A CARRIER COMPOSED OF PARTICLES OF DEVOLATILIZED, STEAM ACTIVATED BITUMINOUS COAL, WHICH CARRIER HAS FROM 20% TO 25% ASH CONTENT.
Claim 2
Dependent Claim
45 words
A CATALYTIC MATERIAL SUITABLE FOR THE CATALYTIC VINYLATION OF ACETIC ACID TO VINYL ACETATE ESSENTIALLY COMPRISING 20% TO 35% BY WEIGHT OF ZINC ACETATE UPON A CARRIER COMPOSED OF PARTICLES OF DEVOLATILIZED, STEAM ACTIVATED BITUMINOUS COAL, WHICH CARRIER HAS FROM 20% TO 25% ASH CONTENT.
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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |