Patent US2787809A successfully refreshed from Google Patents.
US2787809A
Expired / Lapsed
US
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Production of porous shaped articles from thermoplastic substances
Assignee: BASF SE
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Filing: 1953-03-24
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Granted: 1957-04-09
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Expires: 1973-03-24
Abstract
No abstract record available.
Inventors
- 👤 Stastny Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/232; B; B29; B29B; B29B17/00; B29B17/0026; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B32; B32B; B32B27/00; C08J9/16; C08J9/34; C08J9/36; C08J9/365; B29C44/3415; B29C44/3426; B29K; B29K2105/00; B29K2105/04; B29K2105/043; B29K2105/25; B29K2105/253; B29K2105/26; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S264/00; Y10S264/04; Y10S264/07; Y10S264/09; Y10S264/15; Y10S273/00; Y10S273/02; Y10S424/00; Y10S424/07; Y10S521/00; Y10S521/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE PRODUCTION OF POROUS SHAPED ARTICLES OF SYNTHETIC THERMOPLASTIC SUBSTANCES WHICH COMPRISES SUBJECTING SMALL PARTICLES OF A POROUS AND PARTIALLY BUT INCOMPLETELY FOAMED-UP SYNTHETIC THERMOPLASTIC MATERIAL WHICH STILL CONTAIN LIQUIDS IN WHICH THE THERMOPLASTIC MATERIAL IN INSOLUBLE, THESE LIQUIDS HAVING A BOILING POINT WHICH IS LOWER THAN THE SOFTENING POINT OF THE THERMOPLASTIC MATERIAL, TO A HEATING IN A CLOSED MOLD WHICH PERMITS THE ESCAPE OF GASES BUT RETAINS SAID THERMOPLASTIC MATERIAL AT A TEMPERATURE ABOVE THE BOILING POINT OF THE LIQUID AND ABOVE THE SOFTENING POINT OF THE THERMOPLASTIC MATERIAL.
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE PRODUCTION OF POROUS SHAPED ARTICLES OF SYNTHETIC THERMOPLASTIC SUBSTANCES WHICH COMPRISES SUBJECTING SMALL PARTICLES OF A POROUS AND PARTIALLY BUT INCOMPLETELY FOAMED-UP SYNTHETIC THERMOPLASTIC MATERIAL WHICH STILL CONTAIN LIQUIDS IN WHICH THE THERMOPLASTIC MATERIAL IN INSOLUBLE, THESE LIQUIDS HAVING A BOILING POINT WHICH IS LOWER THAN THE SOFTENING POINT OF THE THERMOPLASTIC MATERIAL, TO A HEATING IN A CLOSED MOLD WHICH PERMITS THE ESCAPE OF GASES BUT RETAINS SAID THERMOPLASTIC MATERIAL AT A TEMPERATURE ABOVE THE BOILING POINT OF THE LIQUID AND ABOVE THE SOFTENING POINT OF THE THERMOPLASTIC MATERIAL.
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) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |