US2818372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporating hydrogen peroxide
Assignee: Shell Development Co
•
Filing: 1955-09-06
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Granted: 1957-12-31
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Expires: 1975-09-06
Abstract
No abstract record available.
Inventors
- 👤 Hood George Clement
- 👤 Smith Randolph Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/013; B; B01; B01D; B01D3/00; B01D3/14; B01D3/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR EVAPORATING HYDROGEN PEROXIDE FROM AN AQUEOUS SOLUTION THEREOF WHICH COMPRISES ADMIXING WITH SAID SOLUTION AT LEAST 43 WEIGHT PERCENT OF PHOSPHORIC FIG -01 ACID AND MAINTAINING THE RESULTING MIXTURE AT AN ELEVATED TEMPERATURE IN AN EVAPORATION ZONE.
Claim 2
Dependent Claim
40 words
A PROCESS FOR EVAPORATING HYDROGEN PEROXIDE FROM AN AQUEOUS SOLUTION THEREOF WHICH COMPRISES ADMIXING WITH SAID SOLUTION AT LEAST 43 WEIGHT PERCENT OF PHOSPHORIC FIG -01 ACID AND MAINTAINING THE RESULTING MIXTURE AT AN ELEVATED TEMPERATURE IN AN EVAPORATION ZONE.
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |