US2846450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of maleic anhydride
Assignee: Universal Oil Products Co
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Filing: 1956-12-03
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Granted: 1958-08-05
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Expires: 1976-12-03
Abstract
No abstract record available.
Inventors
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:54
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A PROCESS FOR THE PREPARATION OF A MELEIC ANHYDRIDE WHICH COMPRISES REACTING ONE MOLECULAR PROPORTION OF AN ALIPHATIC OLEFINIC HYDROCARBON HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
24 words
A PROCESS FOR THE PREPARATION OF A MELEIC ANHYDRIDE WHICH COMPRISES REACTING ONE MOLECULAR PROPORTION OF AN ALIPHATIC OLEFINIC HYDROCARBON HAVING THE GENERAL FORMULA
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |