US3313745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing foam bodies from sulfite waste liquor and a foam product produced according to the process
Assignee: Individual
•
Filing: 1963-02-21
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Granted: 1967-04-11
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Klug Oluf Walther Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:07
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/04; C08J2361/00; C08J2361/20; C08J2361/22; C08J2361/24; C08J2497/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PRODUCTION OF FOAMED BODIES FROM SULFITE WASTE LIQUOR WHICH COMPRISES PREPARING A MIXTURE OF ABOUT 1-3 PARTS BY WEIGHT (DRY SOLIDS) OF AN EVAPORATED SULFITE WASTE LIQUOR, AND 1 PART BY WEIGHT (DRY SOLIDS) OF A MELAMINE MODIFIED UREA-FORMALDEHYDE PRE-CONDENSATE, WITH 2-20% BY WEIGHT OF AN ACID CURING AGENT; BASED ON THE WEIGHT OF UREA-FORMALDEHYDE PRE-CONDENSATE, CONVERTING THE MIXTURE INTO A FOAMED CONDITION; AND THEREAFTER CURING THE FOAMED MIXTURE AT ABOUT NORMAL ROOM TEMPERATURE.
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE PRODUCTION OF FOAMED BODIES FROM SULFITE WASTE LIQUOR WHICH COMPRISES PREPARING A MIXTURE OF ABOUT 1-3 PARTS BY WEIGHT (DRY SOLIDS) OF AN EVAPORATED SULFITE WASTE LIQUOR, AND 1 PART BY WEIGHT (DRY SOLIDS) OF A MELAMINE MODIFIED UREA-FORMALDEHYDE PRE-CONDENSATE, WITH 2-20% BY WEIGHT OF AN ACID CURING AGENT; BASED ON THE WEIGHT OF UREA-FORMALDEHYDE PRE-CONDENSATE, CONVERTING THE MIXTURE INTO A FOAMED CONDITION; AND THEREAFTER CURING THE FOAMED MIXTURE AT ABOUT NORMAL ROOM TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |