US2989409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dextran containing sizing composition
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1958-06-17
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Granted: 1961-06-20
•
Expires: 1978-06-17
Abstract
No abstract record available.
Inventors
- 👤 Malvern J Hiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:36
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A SIZING COMPOSITION CONSISTING ESSENTIALLY OF AN AQUEOUS MIXTURE COMPOSED OF TEN PARTS BY WEIGHT OF A PASTE CONTAINING ONE PART BY WEIGHT OF BUTOXYMETHYL-BFORMYL-DODECYL DIMETHYL AMMONIUM CHLORIDE AND 5% BY WEIGHT OF WATER-SOLUBLE UNHYDROLYZED NATIVE DEXTRAN.
Claim 2
Dependent Claim
37 words
A SIZING COMPOSITION CONSISTING ESSENTIALLY OF AN AQUEOUS MIXTURE COMPOSED OF TEN PARTS BY WEIGHT OF A PASTE CONTAINING ONE PART BY WEIGHT OF BUTOXYMETHYL-BFORMYL-DODECYL DIMETHYL AMMONIUM CHLORIDE AND 5% BY WEIGHT OF WATER-SOLUBLE UNHYDROLYZED NATIVE DEXTRAN.
References Cited (Backward Citations)
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US2291021A
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US2671779A
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US2602082A
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US2674584A
Cited
US2853414A
Cited
US2880105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |