US2130985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing thyroxin
Assignee: Winthrop Chemical Co Inc
•
Filing: 1937-03-09
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Granted: 1938-09-20
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Expires: 1957-03-09
Abstract
No abstract record available.
Inventors
- 👤 Lautenschlager Carl Ludwig
- 👤 Mutzenbecher Paul Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:56
CPC Classifications
C; C07; C07C; C07C227/00; C07C227/14; C07C227/16; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83
Claims Analysis
Total Claims: 0
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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) | 1941-09-19 | 1942-03-21 | 1942-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-19 | 1946-03-21 | 1946-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-19 | 1950-03-21 | 1950-09-20 | $7700.00 | Window Closed / Lapsed |