US2624514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding of thermosetting aminoplastic granular molding compositions
Assignee: Wyeth Holdings LLC
•
Filing: 1949-09-30
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Granted: 1953-01-06
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Expires: 1969-09-30
Abstract
No abstract record available.
Inventors
- 👤 Vladimir J Wilhousky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:27
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B13/00; B29C; B29C43/00; C; C08; C08J; C08J3/00; C08J3/12; C08J2361/00; C08J2361/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS WHICH COMPRISES HEATING A FINELY GROUND THEREMOSETTING AMINOPLAST MOLDING POWDER WHILE MAINTAINING IT IN A LOOSE, UNCOMPACTED CONDITION TO A TEMPERATURE OF ABOUT 45-80* C., FEEDING THE HEATED POWDER DIRECTLY INTO A BRIQUETTING MACHINE AND FORMING BRIQUETTES UNDER A PRESSURE OF 5,000-25,000 POUNDS PER SQUARE INCH, SAID BRIQUETTES BEING OF SUCH A SIZE THAT THEY HAVE A RATIO OF AREA TO VOLUME OF LESS THAN 10:1 IMMEDIATELY GRANULATING THE RESULTING BRIQUETTES WHILE HOT TO FORM A GRANULAR MATERIAL, THE PARTICLES OF WHICH ARE SMALL ENOUGH TO PASS THROUGH A 10-MESH SCREEN AND THE MAJOR PORTION OF WHICH WILL NOT PASS THROUGH AN 80-MESH SCREEN.
Claim 2
Dependent Claim
106 words
A PROCESS WHICH COMPRISES HEATING A FINELY GROUND THEREMOSETTING AMINOPLAST MOLDING POWDER WHILE MAINTAINING IT IN A LOOSE, UNCOMPACTED CONDITION TO A TEMPERATURE OF ABOUT 45-80* C., FEEDING THE HEATED POWDER DIRECTLY INTO A BRIQUETTING MACHINE AND FORMING BRIQUETTES UNDER A PRESSURE OF 5,000-25,000 POUNDS PER SQUARE INCH, SAID BRIQUETTES BEING OF SUCH A SIZE THAT THEY HAVE A RATIO OF AREA TO VOLUME OF LESS THAN 10:1 IMMEDIATELY GRANULATING THE RESULTING BRIQUETTES WHILE HOT TO FORM A GRANULAR MATERIAL, THE PARTICLES OF WHICH ARE SMALL ENOUGH TO PASS THROUGH A 10-MESH SCREEN AND THE MAJOR PORTION OF WHICH WILL NOT PASS THROUGH AN 80-MESH SCREEN.
References Cited (Backward Citations)
US2143413A
Cited
US2297505A
Cited
US2319040A
Cited
US2316283A
Cited
US2436771A
Cited
US2461089A
Cited
US2464746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |