US3411863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for chemically attaching compounds to aminized cellulose by means of formaldehyde
Assignee: United States Department of Agriculture
•
Filing: 1965-07-16
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Granted: 1968-11-19
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Expires: 1985-07-16
Abstract
No abstract record available.
Inventors
- 👤 John D Guthrie
- 👤 Marcia S Pottle
- 👤 Matthew F Margavio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:43
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/127; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2668096A
Cited
US2793930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |