Patent US4206371A successfully refreshed from Google Patents.
US3676053A
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Method of modifying fibrous materials
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1969-09-04
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Granted: 1972-07-11
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Expires: 1989-09-04
Abstract
Abstract THE PRESENT INVENTION IS A METHOD OF MODIFYING CELLULOSIC FIBROUS MATERIALS CHARACTERIZED BY IMPREGNATING A CELLULOSID FIBROUS MATERIAL WITH A MODIFIER CONTAINING TETRAOXANE AND/OR PENTAOXANE AND HEAT-TREATING, IT AT AN ELEVATED TEMPERATURE PREFERABLY ABOVE AT LEAST ABOUT 100* C. IN THE PRESENCE OF AN ACID SUBSTANCE. ALSO COVERED ARE NOVEL MODIFIER COMPOSITIONS CONTAINING TETRAOZANE AND/OR PENTAOXANE AND AN ACID CATALYST.
Inventors
- 👤 Yasuhiko Miyake
- 👤 Eifu Takayanagi
- 👤 Shigeo Narita
- 👤 Masaaki Shin
- 👤 Toshio Hayashi
- 👤 Koichi Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:18
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/127; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |