US4634557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deuteroporphyrin derivative or salt thereof
Assignee: Sato Pharmaceutical Research Institute Ltd
•
Filing: 1985-01-11
•
Granted: 1987-01-06
•
Expires: 2005-01-11
Abstract
Abstract Disclosed herein is a deuteroporphyrin derivative represented by the following general formula: ##STR1## wherein one of R 1 and R 2 means --CH(CH 3 )--OR, R being a lower alkyl group, and the other denotes --CH═CH 2 , or R 1 and R 2 both mean --CH(CH 3 )--OR, R having the same meaning as defined above, or a salt thereof. The deuteroporphyrin derivative or its salt can be readily obtained in its pure form and is useful as a photosensitizer in the laser irradiation therapy of cancers.
Inventors
- 👤 Haruo Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:27
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/22; A; A61; A61P; A61P43/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A deuteroporphyrin derivative represented by the following formula: ##STR4## wherein one of R 1 and R 2 is --CH(CH 3 )--OR, wherein R is a lower alkyl group, and the other R 1 or R 2 substituent is --CH═CH 2 , or a photosensitively active salt thereof.
Claim 2
Dependent Claim
47 words
A deuteroporphyrin derivative represented by the following formula: ##STR4## wherein one of R 1 and R 2 is --CH(CH 3 )--OR, wherein R is a lower alkyl group, and the other R 1 or R 2 substituent is --CH═CH 2 , or a photosensitively active salt thereof.
Claim 3
Dependent Claim
17 words
A deuteroporphyrin derivative according to claim 1, which is a 3-alkoxyethyl-8-vinyl-deuteroporphyrin or a photosensitively active salt thereof.
Claim 4
Dependent Claim
17 words
A deuteroporphyrin derivative according to claim 1, which is a 3-vinyl-8-alkoxyethyl-deuteroporphyrin or a photosensitively active salt thereof.
References Cited (Backward Citations)
US3004985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |