US3451765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating spent pulp liquor by adding gas-evolving metals thereto
Assignee: FREDERICK A SCHLEINDL
•
Filing: 1964-03-25
•
Granted: 1969-06-24
•
Expires: 1984-03-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Schleindl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:12
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/12; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD OF TREATING SPENT LIQUORS FROM PULP MAKING, COMPRISING THE STEP OF ADDING A FINELY DIVIDED GAS-EVOLVING MATERIAL CONTAINING AT LEAST ONE METAL ABOVE HYDORGEN IN THE ELECTROMOTIVE SERIES TO THE SPENT LIQUOR, WHEREBY SAID MATERIAL EVOLVES A GAS WHEN MIXED WITH THE SPENT LIQUORS AND LOWERS THE VISCOSITY THEREOF.
Claim 2
Independent Claim
51 words
THE METHOD OF TREATING SPENT LIQUORS FROM PULP MAKING, COMPRISING THE STEP OF ADDING A FINELY DIVIDED GAS-EVOLVING MATERIAL CONTAINING AT LEAST ONE METAL ABOVE HYDORGEN IN THE ELECTROMOTIVE SERIES TO THE SPENT LIQUOR, WHEREBY SAID MATERIAL EVOLVES A GAS WHEN MIXED WITH THE SPENT LIQUORS AND LOWERS THE VISCOSITY THEREOF.
References Cited (Backward Citations)
US738398A
Cited
US1852264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |