Patent US2605284A successfully refreshed from Google Patents.
US2605284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating crystalline amino acids mixtures from natural proteins
Assignee: Stuart Co
•
Filing: 1946-09-09
•
Granted: 1952-07-29
•
Expires: 1966-09-09
Abstract
No abstract record available.
Inventors
- 👤 Henry S Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:13
CPC Classifications
A; A23; A23J; A23J3/00; A23J3/30; A23J3/32; C; C07; C07C; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08; C07K; C07K1/00; C07K1/14; C07K1/30; C07K1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD FOR OBTAINING A CRYSTALLINE MIXTURE OF AMINO ACIDS OR THE SALTS THEREOF FROM AN AQUEOUS SOLUTION HAVING AS A SOLUTE SAID ACIDS CONSISTING OD THE ESSENTIAL STEPS OF MIXING WITH ONE VOLUME OF SAID SOLUTION APPROXIMATELY ONE AND ONE-HALF VOLUMES OF AN ORGANIC MEDIUM TAKEN FROM THE GROUP HAVING THE PROPERTIES OF BEING MISCIBLE WITH THE SOLUTION, HAVING A HIGHER BOILING POINT THAN THE SOLVENT PHASE OF SAID SOLUTION, HAVING AN ELECTROSTATIC EFFECT NOT IN EXCESS OF THAT OF A SLIGHTLY POLAR LIQUID, AND HAVING NO CHEMICAL AFFINITY FOR THE SOLUTE OF THE SOLUTION, SEPARATING THE SOLVENT PHASE OF SAID FIRST SOLUTION FROM THE ORGANIC MEDIUM AND SOLUTE, AND SEPARATING THE ORGANIC MEDIUM FROM THE SOLUTE.
Claim 2
Independent Claim
118 words
A METHOD FOR OBTAINING A CRYSTALLINE MIXTURE OF AMINO ACIDS OR THE SALTS THEREOF FROM AN AQUEOUS SOLUTION HAVING AS A SOLUTE SAID ACIDS CONSISTING OD THE ESSENTIAL STEPS OF MIXING WITH ONE VOLUME OF SAID SOLUTION APPROXIMATELY ONE AND ONE-HALF VOLUMES OF AN ORGANIC MEDIUM TAKEN FROM THE GROUP HAVING THE PROPERTIES OF BEING MISCIBLE WITH THE SOLUTION, HAVING A HIGHER BOILING POINT THAN THE SOLVENT PHASE OF SAID SOLUTION, HAVING AN ELECTROSTATIC EFFECT NOT IN EXCESS OF THAT OF A SLIGHTLY POLAR LIQUID, AND HAVING NO CHEMICAL AFFINITY FOR THE SOLUTE OF THE SOLUTION, SEPARATING THE SOLVENT PHASE OF SAID FIRST SOLUTION FROM THE ORGANIC MEDIUM AND SOLUTE, AND SEPARATING THE ORGANIC MEDIUM FROM THE SOLUTE.
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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |