Patent US2559147A successfully refreshed from Google Patents.
US2559147A
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Preparation of dibasic aromatic acids by oxidation
Assignee: Monsanto Chemicals Ltd
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Filing: 1949-05-24
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Granted: 1951-07-03
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Expires: 1969-05-24
Abstract
No abstract record available.
Inventors
- 👤 William S Emerson
- 👤 Theodore C Shafer
- 👤 Robert A Heimsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:21
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A METHOD OF PREPARING POLYBASIC ACIDS, WHICH COMPRISES MIXTURE IN AN AQUEOUS SOLUTION AN ACID OF THE GROUP CONSISTING OF THE ACIDS OF THE FORMULA:
Claim 2
Independent Claim
25 words
A METHOD OF PREPARING POLYBASIC ACIDS, WHICH COMPRISES MIXTURE IN AN AQUEOUS SOLUTION AN ACID OF THE GROUP CONSISTING OF THE ACIDS OF THE FORMULA:
References Cited (Backward Citations)
DE364442C
Cited
US1721958A
Cited
US2245528A
Cited
US2302462A
Cited
US2276774A
Cited
US2479067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |