US2945876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitamin a intermediates and process for obtaining same
Assignee: Nopco Chemical Co
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Filing: 1957-09-04
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Granted: 1960-07-19
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Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Howard C Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:03
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/06; C07C403/08; C07C403/12; C07C403/18; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
CRYSTALLINE QUATERNARY SALTS OF HIGH PURITY OF AN AMINE COMPOUND WHICH HAS (1) VITAMIN A ACTIVITY, (2) AN ABSORPTION MAXIMUM IN THE ULTRA-VIOLET REGION OF THE SPECTRUM AT 3250 A. AND AN EXTINCTION COEFFICIENT THEREAT OF ABOUT 1000, (3) AN INFRA-RED PATTERN HAVING THE CHARACTERISTIC AMINE BAND, (4) WHEN TREATED WITH HYDROBORMIC ACID, GIVES A PRODUCT HAVING AN ABSORPTION MAXIMUM IN THE ULTRA-VIOLET REGION OF THE SPECTRUM AT 3300 A., (5) WHEN TREATED WITH PHOSPHORIC ACID GIVES A PRODUCT HAVING AN ABSORPTION MAXIMUM IN THE ULTRA-VIOLET REGION OF THE SPECTRUM OF 3280-3300 A., (6) CONTAINS THE VITAMIN A CHROMOPHORIC SYSTEM, (7) CONTAINS A HEXAMETHYLENE TETRAMINE FRAGMENT, (8) HAS A KJELDAHL NITROGEN CONTENT OF ABOUT 9.6% (9) WHEN TREATED WITH ACETIC ANHYDRIDE GIVES A PRODUCT WHICH SHOWS AN AMIDE BAND WHEN SUBJECTED IN INFRA-RED ANALYSIS, (10) WHEN TREATED WITH IODINE IS CONVERTED TO VITAMIN A ALDEHYDE AND (11) WHEN TREATED WITH ALUMINUM ISOPROPOXIDE IS CONVERTED TO VITAMIN A AMINE.
Claim 2
Dependent Claim
158 words
CRYSTALLINE QUATERNARY SALTS OF HIGH PURITY OF AN AMINE COMPOUND WHICH HAS (1) VITAMIN A ACTIVITY, (2) AN ABSORPTION MAXIMUM IN THE ULTRA-VIOLET REGION OF THE SPECTRUM AT 3250 A. AND AN EXTINCTION COEFFICIENT THEREAT OF ABOUT 1000, (3) AN INFRA-RED PATTERN HAVING THE CHARACTERISTIC AMINE BAND, (4) WHEN TREATED WITH HYDROBORMIC ACID, GIVES A PRODUCT HAVING AN ABSORPTION MAXIMUM IN THE ULTRA-VIOLET REGION OF THE SPECTRUM AT 3300 A., (5) WHEN TREATED WITH PHOSPHORIC ACID GIVES A PRODUCT HAVING AN ABSORPTION MAXIMUM IN THE ULTRA-VIOLET REGION OF THE SPECTRUM OF 3280-3300 A., (6) CONTAINS THE VITAMIN A CHROMOPHORIC SYSTEM, (7) CONTAINS A HEXAMETHYLENE TETRAMINE FRAGMENT, (8) HAS A KJELDAHL NITROGEN CONTENT OF ABOUT 9.6% (9) WHEN TREATED WITH ACETIC ANHYDRIDE GIVES A PRODUCT WHICH SHOWS AN AMIDE BAND WHEN SUBJECTED IN INFRA-RED ANALYSIS, (10) WHEN TREATED WITH IODINE IS CONVERTED TO VITAMIN A ALDEHYDE AND (11) WHEN TREATED WITH ALUMINUM ISOPROPOXIDE IS CONVERTED TO VITAMIN A AMINE.
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |