Patent US2537516A successfully refreshed from Google Patents.
US2537516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing hydrogen peroxide by the alternate reduction and oxidation of alkylated anthraquinones
Assignee: BUFFALO ELECTRO CHEM CO
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Filing: 1950-03-09
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Granted: 1951-01-09
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Expires: 1970-03-09
Abstract
No abstract record available.
Inventors
- 👤 Lynn H Dawsey
- 👤 Robert R Umhoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN THE PROCESS FOR MAKING HYDROGEN PEROXIDE BY REDUCTION AND OXIDATION OF ALKYLATED ANTHRAQUINONES DISSOLVED IN A MIXED SOLVENT INCLUDING A CONSTITUENT FOR DISSOLVING THE QUINONE FORM OF THE WORKING MATERIAL AND A CONSTITUENT FOR DISSOLVING THE HYDROQUINONE FORM OF THE WORKING MATERIAL, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS A CONSTITUENT OF SUCH SOLVENT A DISUBSTITUTED ORGANIC ESTER OF A PHOSPHONIC ACID.
Claim 2
Dependent Claim
62 words
IN THE PROCESS FOR MAKING HYDROGEN PEROXIDE BY REDUCTION AND OXIDATION OF ALKYLATED ANTHRAQUINONES DISSOLVED IN A MIXED SOLVENT INCLUDING A CONSTITUENT FOR DISSOLVING THE QUINONE FORM OF THE WORKING MATERIAL AND A CONSTITUENT FOR DISSOLVING THE HYDROQUINONE FORM OF THE WORKING MATERIAL, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS A CONSTITUENT OF SUCH SOLVENT A DISUBSTITUTED ORGANIC ESTER OF A PHOSPHONIC ACID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |