US3039931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heparin color stability
Assignee: Abbott Laboratories
•
Filing: 1958-04-11
•
Granted: 1962-06-19
•
Expires: 1978-04-11
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:25
CPC Classifications
C; C08; C08L; C08L5/00; C08L5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A METHOD FOR COLOR STABILIZING PARENTERALLY SUITABLE HEPARIN COMPRISING PLACING HEPARIN IN AN AQUEOUS SOLUTION AND ADDING THERETO BETWEEN ABOUT 0.05% AND 1% OF AN ALKALI SULFITE, THEREAFTER, SEPARATING AND ISOLATING THE HEPARIN FROM SUCH MIXTURES.
Claim 2
Independent Claim
36 words
A METHOD FOR COLOR STABILIZING PARENTERALLY SUITABLE HEPARIN COMPRISING PLACING HEPARIN IN AN AQUEOUS SOLUTION AND ADDING THERETO BETWEEN ABOUT 0.05% AND 1% OF AN ALKALI SULFITE, THEREAFTER, SEPARATING AND ISOLATING THE HEPARIN FROM SUCH MIXTURES.
References Cited (Backward Citations)
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US2134679A
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US2540786A
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US2647928A
Cited
US2678899A
Cited
US2719812A
Cited
US2899356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |