Patent US4541133A successfully refreshed from Google Patents.
Patent US3853842A successfully refreshed from Google Patents.
US3853842A
Expired / Lapsed
US
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Esters of antibiotics b-5050 and tetrahydro-b-5050
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1971-06-30
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Granted: 1974-12-10
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Expires: 1991-06-30
Abstract
Abstract This invention relates to pharmaceutically useful esters of antibiotics B-5050 and tetrahydro-B-5050, and a method for producing them.
Inventors
- 👤 M Muroi
- 👤 M Izawa
- 👤 T Kishi
- 👤 S Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:35
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/08; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/898
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
25 words
AN ESTER OF A CARBOXYLIC ACID OF 1 TO 10 CARBON ATOMS, WHICH IS SELECTED FROM THE GROUP CONSISTING OF 9,2''- AND 9, 2''-ESTER OF
Claim 2
Dependent Claim
25 words
AN ESTER OF A CARBOXYLIC ACID OF 1 TO 10 CARBON ATOMS, WHICH IS SELECTED FROM THE GROUP CONSISTING OF 9,2''- AND 9, 2''-ESTER OF
Claim 3
Dependent Claim
14 words
A compound claimed in claim 1, namely, 9-acetate of the compound of formula I.
Claim 4
Dependent Claim
14 words
A compound claimed in claim 1, namely, 9-propionate of the compound of formula I.
Claim 5
Dependent Claim
14 words
A compound claimed in claim 1, namely, 9-n-butyrate of the compound of formula I.
Claim 6
Dependent Claim
14 words
A compound claimed in claim 1, namely, 9-i-butyrate of the compound of formula I.
Claim 7
Dependent Claim
14 words
A compound claimed in claim 1, namely, 9-crotonate of the compound of formula I.
Claim 8
Dependent Claim
14 words
A compound claimed in claim 1, namely, 2''-acetate of the compound of formula I.
Claim 9
Dependent Claim
14 words
A compound claim in claim 1, namely, 2''-propionate of the compound of formula I.
Claim 10
Dependent Claim
14 words
A compound claimed in claim 1, namely, 9,2''-diacetate of the compound of formula I.
Claim 11
Dependent Claim
14 words
A compound claimed in claim 1, namely, 9-propionyl-2''-acetate of the compound of formula I.
Claim 12
Dependent Claim
14 words
A compound claimed in claim 1, namely, 9,2''-dipropionate of the compound of formula I.
Claim 13
Dependent Claim
22 words
A compound claimed in claim 1, namely, the 9-propionate of the compound of formula I wherein both R1 and R2 are propionyl.
Claim 14
Dependent Claim
26 words
An ester of a carboxylic acid of 1 to 10 carbon atoms, which is selected from the group consisting of 2''-, 9,2''-, 9,13-, and 9,2'',13-ester of
Claim 15
Dependent Claim
26 words
An ester of a carboxylic acid of 1 to 10 carbon atoms, which is selected from the group consisting of 2''-, 9,2''-, 9,13-, and 9,2'',13-ester of
Claim 16
Dependent Claim
14 words
A compound claimed in claim 13, namely, 9,2'',13-triacetate of the compound of formula II.
Claim 17
Dependent Claim
14 words
A compound claimed in claim 13, namely, 9,2'',13-tripropionate of the compound of formula II.
Claim 18
Dependent Claim
24 words
A compound as claimed in claim 1, namely, the 9-propionate of the compound of formula (I) wherein R1 is propionyl and R2 is i-valeryl.
Claim 19
Dependent Claim
24 words
A compound as claimed in claim 1, namely, the 9-propionate of the compound of formula (I) wherein R1 is acetyl and R2 is propionyl.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |