US2858320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable hematoporphyrin
Assignee: Baxter International Inc
•
Filing: 1956-04-02
•
Granted: 1958-10-28
•
Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Marion C Woods
- 👤 Barbara R Steigman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:58
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/22; A; A61; A61K; A61K47/00; A61K47/02; A61K9/00; A61K9/0012; A61K9/0019; A61K9/14; A61K9/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR PRODUCING A FLUORESCENT-STABLE HEMATOPORPHRIN, COMPRISING DISSOLVING HEMATOPORPHYRIN HYDROCHLORIDE IN AN ALKALI METAL HYDROXIDE HAVING A PHYSIOLOGICALLY ACCEPTABLE CATION, ADJUSTING THE PH OF THE SOLUTION SO ACHIEVED TO A PYSIOLOGICALLY ACCEPTABLE RANGE, STERLIZING SAID SOLUTION AT A TEMPERATURE NO GREATER THAN ROOM TEMPERATURE, FREEZING SAID SOLUTION, AND EVAPORATING THE WATER THEREFROM UNDER IMPOSITION OF A VACUUM.
Claim 2
Dependent Claim
58 words
A PROCESS FOR PRODUCING A FLUORESCENT-STABLE HEMATOPORPHRIN, COMPRISING DISSOLVING HEMATOPORPHYRIN HYDROCHLORIDE IN AN ALKALI METAL HYDROXIDE HAVING A PHYSIOLOGICALLY ACCEPTABLE CATION, ADJUSTING THE PH OF THE SOLUTION SO ACHIEVED TO A PYSIOLOGICALLY ACCEPTABLE RANGE, STERLIZING SAID SOLUTION AT A TEMPERATURE NO GREATER THAN ROOM TEMPERATURE, FREEZING SAID SOLUTION, AND EVAPORATING THE WATER THEREFROM UNDER IMPOSITION OF A VACUUM.
References Cited (Backward Citations)
US1403892A
Cited
US2414070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |