Patent US3414367A successfully refreshed from Google Patents.
US3414367A
Expired / Lapsed
US
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Process for making n-substituted aminoethylsulfonylethyl ethers of cellulose
Assignee: United States Department of Agriculture
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Filing: 1963-11-06
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Granted: 1968-12-03
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Expires: 1983-11-06
Abstract
No abstract record available.
Inventors
- 👤 Clark M Welch
- 👤 John D Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:31
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/248; D06M13/272; D06M13/278; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
AS A COLORED POLYMERIC MATERIAL, THE TERTIARY ADDITION PRODUCT OF A COLORED AROMATIC AMINE, DIVINYL SULFONE, AND CELLULOSE, THE SAID TERTIARY ADDITION PRODUCT BEING REPRESENTED BY THE STRUCTURE:
Claim 2
Dependent Claim
28 words
AS A COLORED POLYMERIC MATERIAL, THE TERTIARY ADDITION PRODUCT OF A COLORED AROMATIC AMINE, DIVINYL SULFONE, AND CELLULOSE, THE SAID TERTIARY ADDITION PRODUCT BEING REPRESENTED BY THE STRUCTURE:
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US3031435A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |