US2619425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying and defatting tissue
Assignee: Individual
•
Filing: 1951-04-03
•
Granted: 1952-11-25
•
Expires: 1971-04-03
Abstract
No abstract record available.
Inventors
- 👤 Levin Ezra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:45
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34; B01D3/36; F; F26; F26B; F26B5/00; F26B5/005; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/833; Y10S530/843; Y10S530/845; Y10S530/855; Y10S530/857; Y10S530/859
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A PROCESS FOR DRYING AND DEFATTING A BIOLOGICAL SUBSTANTCE WHICH COMPRISES SIMULTANEOUSLY DEFATTING AND DRYING BY AZEOTROPIC DISTILLATION OF WATER FROM SAID SUBSTANCE, USING A WATER-IMMISCIBLE FAT SOLVENT, AND MAINTAINING A TEMPERATURE BELOW 100* C., THE IMPROVEMENT COMPRISING CONVERTING SAID SUBSTANCE INTO FLUID PUMPABLE FORM, THEN INTRODUCING SAID FLUID SUBSTANCE IN THE FORM OF DROPLETS INTO A BOILING BODY OF SAID SOLVENT, REMOVING THE WATER FROM SAID SUBSTANCE IN THE FORM OF AN AZEOTROPE WITH SAID SOLVENT, AND RECOVERING THE DRY, DEFATTED SUBSTANCE.
Claim 2
Dependent Claim
84 words
IN A PROCESS FOR DRYING AND DEFATTING A BIOLOGICAL SUBSTANTCE WHICH COMPRISES SIMULTANEOUSLY DEFATTING AND DRYING BY AZEOTROPIC DISTILLATION OF WATER FROM SAID SUBSTANCE, USING A WATER-IMMISCIBLE FAT SOLVENT, AND MAINTAINING A TEMPERATURE BELOW 100* C., THE IMPROVEMENT COMPRISING CONVERTING SAID SUBSTANCE INTO FLUID PUMPABLE FORM, THEN INTRODUCING SAID FLUID SUBSTANCE IN THE FORM OF DROPLETS INTO A BOILING BODY OF SAID SOLVENT, REMOVING THE WATER FROM SAID SUBSTANCE IN THE FORM OF AN AZEOTROPE WITH SAID SOLVENT, AND RECOVERING THE DRY, DEFATTED SUBSTANCE.
References Cited (Backward Citations)
US1005539A
Cited
US1934677A
Cited
US2358869A
Cited
US2522560A
Cited
US2503312A
Cited
US2539544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |