US2820740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Therapeutic preparations of iron
Assignee: BENGER LAB Ltd
•
Filing: 1954-02-24
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Granted: 1958-01-21
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Expires: 1974-02-24
Abstract
No abstract record available.
Inventors
- 👤 London Eric
- 👤 Twigg George Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0021; A; A61; A61K; A61K31/00; A61K31/28; A61K31/295; A61K33/00; A61K33/24; A61K33/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A COMPOSITION COMPRISING A SUBSTANTIALLY NONIONIC COMPLEX OF FERRIC HYDROXIDE WITH A DEXTRAN HAVING AN AVERAGE INTRINSIC VISCOSITY AT 25*C. OF ABOUT 0.025 TO ABOUT 0.25, SAID COMPLEX BEING STABLE IN CONTACT WITH WATER.
Claim 2
Dependent Claim
34 words
A COMPOSITION COMPRISING A SUBSTANTIALLY NONIONIC COMPLEX OF FERRIC HYDROXIDE WITH A DEXTRAN HAVING AN AVERAGE INTRINSIC VISCOSITY AT 25*C. OF ABOUT 0.025 TO ABOUT 0.25, SAID COMPLEX BEING STABLE IN CONTACT WITH WATER.
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |