Patent US3203756A successfully refreshed from Google Patents.
US3203756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing permonosulphates
Assignee: Evonik LCL Ltd
•
Filing: 1962-03-27
•
Granted: 1965-08-31
•
Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 Hildon Anthony Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:15
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/06; C01B15/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR THE PRODUCTION OF A PERMONOSULPHATE SELECTED FROM THE GROUP CONSISTING OF PERMONOSULPHATES OF SODIUM, POTASSIUM, RUBIDIUM, CAESIUM AND AMMONIUM BY REACTION BETWEEN THE CORRESPONDING BISULPHATE AND HYDROGEN PEROXIDE, WHICH PROCESS COMPRISES FORMING AN AQUEOUS SOLUTION CONTAINING HYDROGEN PEROXIDE AND THE CORRESPONDING BISULPHATE IN A MOLAR RATIO OF AT LEAST 3:1, FEEDING SAID SOLUTION THROUGH A REACTION COLUMN IN THE FORM OF A FILM MOVING ALONG THE INTERNAL WALL THEREOF; MAINTAINING IN THE COLUMN A TEMPERATURE OF FROM 70*C. TO 150*C., AND A PRESSURE OF FROM 30 TO 100 MM. HG SO THAT THE VAPOUR PHASE IN CONTACT WITH THE FILM CONTAINS BETWEEN 30 TO 100 MOLES PERCENT OF HYDROGEN PEROXIDE BASED ON THE HYDROGEN PEROXIDE AND WATER CONTENT OF THE VAPOUR; AND REMOVING RESULTING PERMONOSULPHATE-CONTAINING REACTION PRODUCT FROM THE COLUMN.
Claim 2
Dependent Claim
133 words
A PROCESS FOR THE PRODUCTION OF A PERMONOSULPHATE SELECTED FROM THE GROUP CONSISTING OF PERMONOSULPHATES OF SODIUM, POTASSIUM, RUBIDIUM, CAESIUM AND AMMONIUM BY REACTION BETWEEN THE CORRESPONDING BISULPHATE AND HYDROGEN PEROXIDE, WHICH PROCESS COMPRISES FORMING AN AQUEOUS SOLUTION CONTAINING HYDROGEN PEROXIDE AND THE CORRESPONDING BISULPHATE IN A MOLAR RATIO OF AT LEAST 3:1, FEEDING SAID SOLUTION THROUGH A REACTION COLUMN IN THE FORM OF A FILM MOVING ALONG THE INTERNAL WALL THEREOF; MAINTAINING IN THE COLUMN A TEMPERATURE OF FROM 70*C. TO 150*C., AND A PRESSURE OF FROM 30 TO 100 MM. HG SO THAT THE VAPOUR PHASE IN CONTACT WITH THE FILM CONTAINS BETWEEN 30 TO 100 MOLES PERCENT OF HYDROGEN PEROXIDE BASED ON THE HYDROGEN PEROXIDE AND WATER CONTENT OF THE VAPOUR; AND REMOVING RESULTING PERMONOSULPHATE-CONTAINING REACTION PRODUCT FROM THE COLUMN.
References Cited (Backward Citations)
US3002813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |