US3073755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of hydrogen peroxide
Assignee: Evonik LCL Ltd
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Filing: 1960-08-05
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Granted: 1963-01-15
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Expires: 1980-08-05
Abstract
No abstract record available.
Inventors
- 👤 Banfield Reginald Henry
- 👤 Hildon Anthony Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:04
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN THE PROCESS OF FRACTIONATING A VAPOR MIXTURE OF HYDROGEN PEROXIDE VAPOR AND WATER VAPOR, THE IMPROVEMENT WHICH COMPRISES INTRODUCING SAID MIXTURE INTO A COLUMN CONSTRUCTED OF ALUMINIUM METAL CONTAINING A LEAST 99.5 PERCENT ALUMINIUM BY WEIGHT, CONDENSING A PORTION OF THE VAPOR, WITHDRAWING CONDENSED HYDROGEN PEROXIDE VAPOR FROM THE LOWER PORTION OF THE COLUMN AND WITHDRAWING WATER VAPOR FROM AN UPPER PORTION OF THE COLUMN, AND INTRODUCING INTO THE UPPER PORTION OF THE COLUMN AN AQUEOUS SOLUTION OF PYROPHOSHPATE SALT WHICH WILL SUPPLY PYROPHOSPHATE IONS IN A CONCENTRATION OF 10 TO 300 P.P.M.
Claim 2
Dependent Claim
94 words
IN THE PROCESS OF FRACTIONATING A VAPOR MIXTURE OF HYDROGEN PEROXIDE VAPOR AND WATER VAPOR, THE IMPROVEMENT WHICH COMPRISES INTRODUCING SAID MIXTURE INTO A COLUMN CONSTRUCTED OF ALUMINIUM METAL CONTAINING A LEAST 99.5 PERCENT ALUMINIUM BY WEIGHT, CONDENSING A PORTION OF THE VAPOR, WITHDRAWING CONDENSED HYDROGEN PEROXIDE VAPOR FROM THE LOWER PORTION OF THE COLUMN AND WITHDRAWING WATER VAPOR FROM AN UPPER PORTION OF THE COLUMN, AND INTRODUCING INTO THE UPPER PORTION OF THE COLUMN AN AQUEOUS SOLUTION OF PYROPHOSHPATE SALT WHICH WILL SUPPLY PYROPHOSPHATE IONS IN A CONCENTRATION OF 10 TO 300 P.P.M.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |