US3912705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thyrotropin releasing hormone analogs
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1974-02-07
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Granted: 1975-10-14
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Expires: 1994-02-07
Abstract
Abstract A novel compound of the formula wherein each of R1, R2 and R3 means hydrogen or an alkyl having 1 to 3 carbon atoms and X means oxygen or sulfur and its pharmaceutically acceptable salts, which are useful agents having a thyrotropin releasing hormone action for medical use.
Inventors
- 👤 Masahiko Fujino
- 👤 Tsunehiko Fukuda
- 👤 Chitoshi Hatanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:33
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/16; A; A61; A61P; A61P25/00; C07K; C07K5/00; C07K5/04; C07K5/08; C07K5/0821
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
12 words
The compound as claimed in claim 1, wherein the compound is L-2-oxo-oxazolidine-4-carbonyl-L-histidyl-L-prolineamide.
Claim 4
Dependent Claim
12 words
The compound as claimed in claim 1, wherein the compound is L-trans-5-methyl-2-oxo-oxazolidine-4-carbonyl-L-histidyl-L-prolineamide.
Claim 5
Dependent Claim
12 words
The compound as claimed in claim 1, wherein the compound is L-2-oxothiazolidine-4-carbonyl-L-histidyl-L-prolineamide.
References Cited (Backward Citations)
US3821188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |