Patent US2579482A successfully refreshed from Google Patents.
US2579482A
Expired / Lapsed
US
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Adhesive composition of sulphite waste liquor, phosphoric acid, and sulfur dioxide
Assignee: Individual
•
Filing: 1948-02-17
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Granted: 1951-12-25
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Expires: 1968-02-17
Abstract
No abstract record available.
Inventors
- 👤 James E Fenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:41
CPC Classifications
C; C09; C09J; C09J197/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
AN ADHESIVE COMPRISING THE CONCENTRATED WASTE LIQUOR OF THE SULFITE-PULP PROCESS TREATED WITH A SMALL QUANTITY OF PHOSPHORIC ACID AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SULFUR DIOXIDE AND A MATERIAL CAPABLE OF RELASING SULFUR DIOXIDE WHEN MIXED WITH WATER, THE AMOUNT OF SULFUR DIOXIDE USED BEINGEQUIVALENT TO THAT RELEASED BY APPROXIMATELY 1 PER CENT OF ZINC HYDROSULFITE.
Claim 2
Dependent Claim
60 words
AN ADHESIVE COMPRISING THE CONCENTRATED WASTE LIQUOR OF THE SULFITE-PULP PROCESS TREATED WITH A SMALL QUANTITY OF PHOSPHORIC ACID AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SULFUR DIOXIDE AND A MATERIAL CAPABLE OF RELASING SULFUR DIOXIDE WHEN MIXED WITH WATER, THE AMOUNT OF SULFUR DIOXIDE USED BEINGEQUIVALENT TO THAT RELEASED BY APPROXIMATELY 1 PER CENT OF ZINC HYDROSULFITE.
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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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |