US3141656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscose dissolver
Assignee: Akzona Inc
•
Filing: 1961-01-31
•
Granted: 1964-07-21
•
Expires: 1981-01-31
Abstract
No abstract record available.
Inventors
- 👤 Wijn Nanning De
- 👤 Oever Arend Ten
- 👤 Holewijn Huibert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:08
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; B; B01; B01F; B01F27/00; B01F27/80; B01F27/808; B01F35/00; B01F35/30; B01F35/32; B01F35/321; B01F35/3213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A MIXING APPARATUS COMPRISING A VESSEL HAVING SIDE WALLS AND A BOTTOM FOR CONTAINING LIQUID TO BE MIXED, EXTENDING UPWARDLY THEREFROM IN SPACED RELATIONSHIP TO SAID SIDE WALLS, AN IMPELLER ROTATABLY MOUNTED ABOVE THE BOTTOM AND COAXIALLY OF SAID VESSEL, A DRIVE SHAFT EXTENDING UPWARDLY THROUGH SAID BOTTOM OF SAID VESSEL AND CONNECTED TO SAID IMPELLER FOR ROTATING IT TO CIRCULAR LIQUID CONTAINED WITHIN SAID VESSEL ABOUT SAID GUIDE TUBE, MEANS FOR ROTATING SAID SHAFT CONNECTED WITH END OF SAID SHAFT EXTENDING DOWNWARDLY FROM SAID BOTTOM OF SAID
Claim 2
Dependent Claim
88 words
A MIXING APPARATUS COMPRISING A VESSEL HAVING SIDE WALLS AND A BOTTOM FOR CONTAINING LIQUID TO BE MIXED, EXTENDING UPWARDLY THEREFROM IN SPACED RELATIONSHIP TO SAID SIDE WALLS, AN IMPELLER ROTATABLY MOUNTED ABOVE THE BOTTOM AND COAXIALLY OF SAID VESSEL, A DRIVE SHAFT EXTENDING UPWARDLY THROUGH SAID BOTTOM OF SAID VESSEL AND CONNECTED TO SAID IMPELLER FOR ROTATING IT TO CIRCULAR LIQUID CONTAINED WITHIN SAID VESSEL ABOUT SAID GUIDE TUBE, MEANS FOR ROTATING SAID SHAFT CONNECTED WITH END OF SAID SHAFT EXTENDING DOWNWARDLY FROM SAID BOTTOM OF SAID
References Cited (Backward Citations)
US2341185A
Cited
US2461746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |