US3006871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cellular furane ring compound modified urea-formaldehyde condensates and articles obtained thereby
Assignee: Wyeth Holdings LLC
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Filing: 1959-06-23
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Granted: 1961-10-31
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Expires: 1979-06-23
Abstract
No abstract record available.
Inventors
- 👤 George B Sunderland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:44
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C08J2361/00; C08J2361/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A METHOD OF MAKING A RESILIENT, THERMALLY HARDENED CELLULAR ARTICLE OF MANUFACTURE EXHIBITING IMPROVED COMPRESSIVE STRENGTH AND ABRASION RESISTANT PROPERTIES WHICH COMPRISES: (1) FORMING AN AQUEOUS SUSPENSION HAVING A RESIN SOLIDS CONTENT OF FROM ABOUT 20 TO 40 PERCENT OF (A) A UREA-FORMALDEHYDE CONDENSATE WHICH HAS BEEN MODIFIED BY A FURANE RING COMPOUND SELECTED FROM THE GROUP CONSISTING OF FURFURAL AND FURFURYL ALCOHOL, SAID MODIFIED CONDENSATE HAVING A MOL RATIO OF UREA TO FORMALDEHYDE OF FROM ABOUT 1:1 TO 1:2, RESPECTIVELY, AND A WEIGHT RATIO OF UREA-FORMALDEHYDE CONDENSATE TO FURANE RING COMPOUND OF FROM ABOUT 1:0.05 TO 1:0.5, RESPECTIVELY, AND (B) FROM ABOUT 1 TO 2 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID RESIN SOLIDS, OF A SURFACE ACTIVE FOAMING AGENT, (2) AERATING SAID AQUEOUS SUSPENSION TO PRODUCE A RESINOUS FOAM HAVING A SPECIFIC GRAVITY OF FROM ABOUT 0.05 TO 0.06 AND (3) HEAT CURING SAID RESINOUS FOAM IN THE PRESENCE OF AN ACID CATALYST WHEREBY SAID RESINOUS FOAM IS CONVERTED TO A SUBSTANTIALLY INSOLUBLE AND INFUSIBLE STATE.
Claim 2
Independent Claim
170 words
A METHOD OF MAKING A RESILIENT, THERMALLY HARDENED CELLULAR ARTICLE OF MANUFACTURE EXHIBITING IMPROVED COMPRESSIVE STRENGTH AND ABRASION RESISTANT PROPERTIES WHICH COMPRISES: (1) FORMING AN AQUEOUS SUSPENSION HAVING A RESIN SOLIDS CONTENT OF FROM ABOUT 20 TO 40 PERCENT OF (A) A UREA-FORMALDEHYDE CONDENSATE WHICH HAS BEEN MODIFIED BY A FURANE RING COMPOUND SELECTED FROM THE GROUP CONSISTING OF FURFURAL AND FURFURYL ALCOHOL, SAID MODIFIED CONDENSATE HAVING A MOL RATIO OF UREA TO FORMALDEHYDE OF FROM ABOUT 1:1 TO 1:2, RESPECTIVELY, AND A WEIGHT RATIO OF UREA-FORMALDEHYDE CONDENSATE TO FURANE RING COMPOUND OF FROM ABOUT 1:0.05 TO 1:0.5, RESPECTIVELY, AND (B) FROM ABOUT 1 TO 2 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID RESIN SOLIDS, OF A SURFACE ACTIVE FOAMING AGENT, (2) AERATING SAID AQUEOUS SUSPENSION TO PRODUCE A RESINOUS FOAM HAVING A SPECIFIC GRAVITY OF FROM ABOUT 0.05 TO 0.06 AND (3) HEAT CURING SAID RESINOUS FOAM IN THE PRESENCE OF AN ACID CATALYST WHEREBY SAID RESINOUS FOAM IS CONVERTED TO A SUBSTANTIALLY INSOLUBLE AND INFUSIBLE STATE.
References Cited (Backward Citations)
US2337915A
Cited
US2518388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |