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US4604241A
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9-desoxo-9-hydroxy-pheophorbide derivatives and alkaline salts thereof
Assignee: TOYO HAKKA KOGYO A CORP OF JAPAN KK
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Filing: 1984-10-24
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Granted: 1986-08-05
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Expires: 2004-10-24
Abstract
Abstract Nine-desoxo-hydroxy-pheophorbide derivatives and alkaline salts thereof represented by the general formula: ##STR1## wherein R 1 represents CH 3 or CH 2 OH, R 2 represents H or Ac, and R 3 represents H or alkali metal, are useful for treating cancer having a strong preferential affinity for cancer cells over normal cells and exerting upon irradiation a destructive effect on such cancer cells.
Inventors
- 👤 Isao Sakata
- 👤 Susumu Nakajima
- 👤 Koichi Koshimizu
- 👤 Natsuki Samejima
- 👤 Kazumi Inohara
- 👤 Hiroyuki Takata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:25
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/22; A; A61; A61P; A61P35/00; C07D519/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
9-desoxo-9-hydroxy-pheophorbide derivatives and alkaline salts thereof represented by the general formula: ##STR5## wherein R 1 represents CH 3 or CH 2 OH, R 2 represents H or acetyl, and R 3 represents H or an alkali metal atom.
Claim 2
Dependent Claim
38 words
9-desoxo-9-hydroxy-pheophorbide derivatives and alkaline salts thereof represented by the general formula: ##STR5## wherein R 1 represents CH 3 or CH 2 OH, R 2 represents H or acetyl, and R 3 represents H or an alkali metal atom.
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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |