Patent US2891918A successfully refreshed from Google Patents.
US2891918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfite liquor base resin and method of making the same
Assignee: Individual
•
Filing: 1953-06-01
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Granted: 1959-06-23
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Expires: 1973-06-01
Abstract
No abstract record available.
Inventors
- 👤 Uschmann Curt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:23
CPC Classifications
C; C09; C09J; C09J197/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
A THERMOSETTING RESIN BINDER CONTAINING A REACTION PRODUCT OF FURFURAL AND ALKALIZED SULFITE LIQUOR, AND A SODIUM SOAP OF PINE TREE RESIN.
Claim 2
Dependent Claim
22 words
A THERMOSETTING RESIN BINDER CONTAINING A REACTION PRODUCT OF FURFURAL AND ALKALIZED SULFITE LIQUOR, AND A SODIUM SOAP OF PINE TREE RESIN.
Claim 3
Independent Claim
46 words
THE METHOD OF TREATING WASTE SULFITE LIQUOR, AND COMPRISES CONCENTRATING THE LIQUOR AND COOKING THE CONCENTRATED LIQUOR WITH CAUSTIC ALKALI AND FURFURAL, AND DURING SUCH COOKING CAPTURING COMPONENTS OF THE LIQUID WHICH VAPORIZE, CONDENSING SUCH VAPORS AND RETURNING THE CONDENSATE TO THE LIQUID FOR INCORPORATION THEREIN.
Claim 4
Independent Claim
46 words
THE METHOD OF TREATING WASTE SULFITE LIQUOR, AND COMPRISES CONCENTRATING THE LIQUOR AND COOKING THE CONCENTRATED LIQUOR WITH CAUSTIC ALKALI AND FURFURAL, AND DURING SUCH COOKING CAPTURING COMPONENTS OF THE LIQUID WHICH VAPORIZE, CONDENSING SUCH VAPORS AND RETURNING THE CONDENSATE TO THE LIQUID FOR INCORPORATION THEREIN.
References Cited (Backward Citations)
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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) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |