US2787518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dextran solutions
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1955-09-20
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Granted: 1957-04-02
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Expires: 1975-09-20
Abstract
No abstract record available.
Inventors
- 👤 Malvern J Hiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:33
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D01; D01F; D01F9/00; D06; D06M; D06M11/00; D06M11/80; D06M11/81; D06M15/00; D06M15/01; D06M15/03; D06M15/11
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
31 words
A METHOD OF FORMING SHAPED ARTICLES OF DEXTRAN WHICH COMPRISES DISSOLVING THE DEXTRAN IN AQUEOUS BORON TRIFLUORIDE AND EXTRUDING THE SOLUTION THROUGH A SUITABLE SHAPING DEVICE INTO AN AQUEOUS SETTING BATH.
References Cited (Backward Citations)
US2674517A
Cited
US2702231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |