Patent US2862934A successfully refreshed from Google Patents.
US2862934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing tachysterol and dihydrotachysterol
Assignee: US Philips Corp
•
Filing: 1956-02-10
•
Granted: 1958-12-02
•
Expires: 1976-02-10
Abstract
No abstract record available.
Inventors
- 👤 Koevoet Arie Lambertus
- 👤 Verloop Arie
- 👤 Buisman Jan Anne Keverling
- 👤 Westerhof Pieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
C; C07; C07C; C07C401/00; C07C2601/00; C07C2601/12; C07C2601/14; C07C2601/16; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF PRODUCING A TACHYSTEROL COMPRISING THE STEPS OF ADDING TO A SOLUTION CONTAINING PRE-CALCIFEROL AND HAVING AN ALKALINITY EXTENDING FROM NEUTRAL TO SLIGHTLY ALKALINE, A CATALYST CAPABLE OF TRANSFORMING CIS-ISOMERS TO TRANS-ISOMERS AND SELECTED FROM THE GROUP CONSISTING OF IODINE AND COSINE, AND EXPOSING SAID SOLUTION TO THE ACTION OF ACTINIC LIGHT TO CONVERT THE PRE-CALCIFEROL TO A TACHYSTEROL.
Claim 2
Independent Claim
61 words
A METHOD OF PRODUCING A TACHYSTEROL COMPRISING THE STEPS OF ADDING TO A SOLUTION CONTAINING PRE-CALCIFEROL AND HAVING AN ALKALINITY EXTENDING FROM NEUTRAL TO SLIGHTLY ALKALINE, A CATALYST CAPABLE OF TRANSFORMING CIS-ISOMERS TO TRANS-ISOMERS AND SELECTED FROM THE GROUP CONSISTING OF IODINE AND COSINE, AND EXPOSING SAID SOLUTION TO THE ACTION OF ACTINIC LIGHT TO CONVERT THE PRE-CALCIFEROL TO A TACHYSTEROL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |