US2808378A
Expired / Lapsed
US
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Effect of reagent aoid concentration on
Assignee: —
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Filing: —
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Granted: 1957-10-01
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Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:37
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C07; C07C; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A PROCESS FOR MAKING AN OXIDIZED ALKYL SULFATE EXTRACT HAVING ANTI-FOAMING PROPERTIES WHICH COMPRISES MIXING 100 PARTS OF SULFURIC ACID OF ABOUT 85 TO 96% STRENGTH WITH ABOUT 5 TO 30 PARTRS OF AN ALIPHATIC REAGENT SELECTED FROM THE GROUP CONSISTING OF C3 AND C5 ALIPHATIC ALCOHOLS, PROPYLENE, AMYLENES AND MIXTURES THEREOF, AND MAINTAINING THE MIXTURE AT AN OXIDATIVE REACTION TEMPERATURE FOR A PERIOD OF ABOUT 1 TO 15 HOURS, A REACTION PERIOD FOR AT LEAST 2 HOURS BEING REQUIRED AT 25* C. IN THE CASE OF ABOUT 90% ACID AND CORRESPONDINGLY LONGER BEING REQUIRED IN THE CASE OF WEAKER ACIDS AND LOWER TEMPERATURES.
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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |