US3767778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of hydrogen peroxide
Assignee: DEUTSCHE GOLD und SILBER SCHEIDEANSTALT DT
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Filing: 1971-04-12
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Granted: 1973-10-23
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Expires: 1991-04-12
Abstract
Abstract HYDROGEN PEROXIDE IS PREPARED BY THE ANTHRAQUINONE PROCESS USING A TETRASUBTITUTED UREA AS A SOLVENT FOR THE REACTION CARRIER.
Inventors
- 👤 G Giesselmann
- 👤 G Schreyer
- 👤 W Weigert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:59
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 0
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |