US3409463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of cellulosic materials with a polyaziridinylphosphoramide and a sulfamide
Assignee: Dow Chemical Co
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Filing: 1964-09-17
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Granted: 1968-11-05
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Expires: 1984-09-17
Abstract
No abstract record available.
Inventors
- 👤 Blanc Robert B Le
- 👤 Richard H Symm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/438; D06M15/00; D06M15/19; D06M15/37; D06M15/667; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/4935; Y10T428/662; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/2689
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB761985A
Cited
US2859134A
Cited
US2889289A
Cited
US2891877A
Cited
US2901444A
Cited
US3034919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |