US3081820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulp preparation
Assignee: Lummus Technology LLC
•
Filing: 1958-01-16
•
Granted: 1963-03-19
•
Expires: 1978-01-16
Abstract
No abstract record available.
Inventors
- 👤 Auxilius P Schnyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:07
CPC Classifications
D; D21; D21C; D21C7/00; D21C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A BLOW TANK FOR TREATING DIGESTED CELLULOSE-CONTAINING MATERIALS, COMPRISING A TANK; AN ANNULAR RESTRICTING BAFFLE FOR DIVIDING SAID TANK INTO AN UPPER FLASH STEAM ZONE AND A LOWER STOCK DILUTION ZONE, SAID UPPER zONE
Claim 2
Dependent Claim
34 words
A BLOW TANK FOR TREATING DIGESTED CELLULOSE-CONTAINING MATERIALS, COMPRISING A TANK; AN ANNULAR RESTRICTING BAFFLE FOR DIVIDING SAID TANK INTO AN UPPER FLASH STEAM ZONE AND A LOWER STOCK DILUTION ZONE, SAID UPPER zONE
References Cited (Backward Citations)
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US405142A
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US1265330A
Cited
US1685754A
Cited
US1757108A
Cited
US1908615A
Cited
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Cited
US2342225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |