US3150108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a urea-formaldehyde resin foam
Assignee: WERNER H KREIDL DR
•
Filing: 1960-03-22
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Granted: 1964-09-22
•
Expires: 1980-03-22
Abstract
No abstract record available.
Inventors
- 👤 Vieli Otto Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:05
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7409; B29B7/7414
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
IN A PROCESS FOR THE PRODUCTION OF A UREA-FORMALDEHYDE RESIN FOAM, THE STEPS COMPRISING FROTHING UNDER PRESSURE AN AQUEOUS SOLUTION OF A FOAMING AGENT FOR A UREA-FORMALDEHYDE-RESIN SOLUTION TOGETHER WITH A HARDENING AGENT FOR SAID RESIN SOLUTION, PRESSURE-RELIEVING THE FOAMED MIXTURE THUS OBTAINED WHILE ADDING SAID UREA-FORMALDEHYDE-RESIN SOLUTION, AND
Claim 2
Dependent Claim
49 words
IN A PROCESS FOR THE PRODUCTION OF A UREA-FORMALDEHYDE RESIN FOAM, THE STEPS COMPRISING FROTHING UNDER PRESSURE AN AQUEOUS SOLUTION OF A FOAMING AGENT FOR A UREA-FORMALDEHYDE-RESIN SOLUTION TOGETHER WITH A HARDENING AGENT FOR SAID RESIN SOLUTION, PRESSURE-RELIEVING THE FOAMED MIXTURE THUS OBTAINED WHILE ADDING SAID UREA-FORMALDEHYDE-RESIN SOLUTION, AND
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Cited
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Cited
US2559891A
Cited
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Cited
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |