Patent US3243341A successfully refreshed from Google Patents.
US3243341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous pulping apparatus
Assignee: Improved Machinery Inc
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Filing: 1961-11-20
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Granted: 1966-03-29
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Lang James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:23
CPC Classifications
D; D21; D21C; D21C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
APPARATUS FOR CONTINUOUSLY TREATING SOLID PARTICLES BY SEQUENTIAL SEPARATE TREATMENTS, COMPRISING A GENERALLY UPRIGHT ELONGATED VESSEL HAVING DISCHARGE MEANS ADJACENT THE UPPER END OF SAID VESSEL, A PLURALITY OF FLUID ACCESS OPENINGS IN SAID VESSEL SPACED FROM ONE ANOTHER THEREALONG, AT LEAST SOME OF SAID OPENINGS COMPRISING STRAINER MEANS FOR DISCHARGING FLUID FROM SAID VESSEL AND OTHERS OF SAID ACCESS OPENINGS COMPRISING MEANS FOR INTRODUCING FLUID INTO SAID VESSEL, WITH SAID OPENINGS DEFINING UPPER AND LOWER TREATMENT ZONES, MEANS FOR SUPPLYING DISSIMILAR FLUIDS TO AT LEAST TWO OF SAID OPENINGS FOR ESTABLISHING SAID UPPER AND LOWER TREATMENT ZONES WITH AN INTERFACE THEREBETWEEN, MEANS MAINTAINING SAID INTEFACE INCLUDING VALVE MEANS FOR CONTROLLING FLUID DISCHARGED FROM SAID LOWER
Claim 2
Dependent Claim
116 words
APPARATUS FOR CONTINUOUSLY TREATING SOLID PARTICLES BY SEQUENTIAL SEPARATE TREATMENTS, COMPRISING A GENERALLY UPRIGHT ELONGATED VESSEL HAVING DISCHARGE MEANS ADJACENT THE UPPER END OF SAID VESSEL, A PLURALITY OF FLUID ACCESS OPENINGS IN SAID VESSEL SPACED FROM ONE ANOTHER THEREALONG, AT LEAST SOME OF SAID OPENINGS COMPRISING STRAINER MEANS FOR DISCHARGING FLUID FROM SAID VESSEL AND OTHERS OF SAID ACCESS OPENINGS COMPRISING MEANS FOR INTRODUCING FLUID INTO SAID VESSEL, WITH SAID OPENINGS DEFINING UPPER AND LOWER TREATMENT ZONES, MEANS FOR SUPPLYING DISSIMILAR FLUIDS TO AT LEAST TWO OF SAID OPENINGS FOR ESTABLISHING SAID UPPER AND LOWER TREATMENT ZONES WITH AN INTERFACE THEREBETWEEN, MEANS MAINTAINING SAID INTEFACE INCLUDING VALVE MEANS FOR CONTROLLING FLUID DISCHARGED FROM SAID LOWER
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |