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US3431297A
Expired / Lapsed
US
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Preparation of acetic acid by catalytic gas-phase oxidation of butenes
Assignee: Huels AG
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Filing: 1966-12-23
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Granted: 1969-03-04
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Expires: 1986-12-23
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Brockhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:45
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2097904A
Cited
DE1173887B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |