US2505735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purufication of crude glycerine
Assignee: Harshaw Chemical Co
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Filing: 1948-05-22
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Granted: 1950-04-25
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Expires: 1968-05-22
Abstract
No abstract record available.
Inventors
- 👤 Harold S Halbedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:34
CPC Classifications
C; C11; C11D; C11D19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
PROCESS FOR PURIFICATION OF GLYCERINE COMPRISING FORMING IN A BODY OF CRUDE GLYCERINE HYDROGEN AND MATERIAL OF THE CLASS CONSISTING OF THE SULFATES OF ZINC AND IRON AND MIXTURES THEREOF, THE WEIGHT OF THE METAL CONTENT OF SAID MATERIAL SO FORMED BEING FROM 1/10% TO 1% OF THE WEIGHT OF THE GLYCERINE, NEUTRALIZING THE RESULTING MIXTURE TO A PH FROM 7.5 TO 10.0 AND THEN FILTERING OFF THE SOLIDS AND DISTILLING THE FILTRATE AT PH VALUES BETWEEN 7.5 TO 10.0 SAID CRUDE GLYCERINE INITIALLY CONTAINING AT LEAST 75% GLYCEROL.
Claim 2
Dependent Claim
89 words
PROCESS FOR PURIFICATION OF GLYCERINE COMPRISING FORMING IN A BODY OF CRUDE GLYCERINE HYDROGEN AND MATERIAL OF THE CLASS CONSISTING OF THE SULFATES OF ZINC AND IRON AND MIXTURES THEREOF, THE WEIGHT OF THE METAL CONTENT OF SAID MATERIAL SO FORMED BEING FROM 1/10% TO 1% OF THE WEIGHT OF THE GLYCERINE, NEUTRALIZING THE RESULTING MIXTURE TO A PH FROM 7.5 TO 10.0 AND THEN FILTERING OFF THE SOLIDS AND DISTILLING THE FILTRATE AT PH VALUES BETWEEN 7.5 TO 10.0 SAID CRUDE GLYCERINE INITIALLY CONTAINING AT LEAST 75% GLYCEROL.
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) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |