US3440002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous material having a polyalkylene imine bound thereto by a polyfunctional fixative
Assignee: United States Department of Agriculture
•
Filing: 1967-05-12
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Granted: 1969-04-22
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Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 Robert E Whitfield
- 👤 Allen G Pittman
- 👤 William L Wasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:25
CPC Classifications
D; D06; D06M; D06M23/00; D06M13/00; D06M13/10; D06M13/184; D06M13/192; D06M13/322; D06M13/325; D06M15/00; D06M15/19; D06M15/21; D06M15/227; D06M15/263; D06M15/267; D06M15/273; D06M15/285; D06M15/37; D06M15/39; D06M15/507; D06M15/53; D06M15/564; D06M15/59; D06M15/61; D06M15/643; D06M15/6436; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T442/00; Y10T442/20; Y10T442/2033; Y10T442/2279; Y10T442/2352; Y10T442/2369; Y10T442/2385; Y10T442/2393; Y10T442/2549; Y10T442/259; Y10T442/2762
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2678287A
Cited
US3078138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |