US3391135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of low molecular weight cellulose derivatives
Assignee: Shin-Etsu Chemical Co Ltd
•
Filing: 1965-10-18
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Granted: 1968-07-02
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Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 Ouno Shigeru
- 👤 Tonedachi Masayuki
- 👤 Koyanagi Shunichi
- 👤 Ito Kenichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:23
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/286; A61K9/2866; C; C08; C08B; C08B11/00; C08B11/20; C08B15/00; C08B15/02; C08B3/00; C08B3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3175928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |