US3354026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
De-inking printed waste cellulosic stock
Assignee: Garden State Paper Co Inc
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Filing: 1963-09-05
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Granted: 1967-11-21
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Expires: 1983-09-05
Abstract
No abstract record available.
Inventors
- 👤 Robert H Illingworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:33
CPC Classifications
D; D21; D21C; D21C5/00; D21C5/02; D21C5/025; D21C5/027; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN A METHOD OF DE-INKING PRINTED WASTE CELLULOSIC STOCK, THE IMPROVEMENT WHICH COMPRISES UTILIZING AS THE ACTIVE DE-INKING AGENT BETWEEN ABOUT 0.1 AND 3 PERCENT BY WEIGHT OF THE WASTE CELLULOSIC STOCK A PRODUCT FORMED BY SULFATING THE FATTY ACYL DERIVATIVE OF 4-AMINO BUTANOL2, SAID PRODUCT HAVING THE GENERAL STRUCTURAL FORMULA R-CO-NH-CH2-CH2-CH(-CH3)-O-SO3-NA WHERE R IS A LONG CHAIN ALKYL GROUP CONTAINING 9-19 CARBON ATOMS.
Claim 2
Dependent Claim
64 words
IN A METHOD OF DE-INKING PRINTED WASTE CELLULOSIC STOCK, THE IMPROVEMENT WHICH COMPRISES UTILIZING AS THE ACTIVE DE-INKING AGENT BETWEEN ABOUT 0.1 AND 3 PERCENT BY WEIGHT OF THE WASTE CELLULOSIC STOCK A PRODUCT FORMED BY SULFATING THE FATTY ACYL DERIVATIVE OF 4-AMINO BUTANOL2, SAID PRODUCT HAVING THE GENERAL STRUCTURAL FORMULA R-CO-NH-CH2-CH2-CH(-CH3)-O-SO3-NA WHERE R IS A LONG CHAIN ALKYL GROUP CONTAINING 9-19 CARBON ATOMS.
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |