Patent US4149541A successfully refreshed from Google Patents.
Patent US2744291A successfully refreshed from Google Patents.
US2744291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of porous shaped articles from thermoplastic materials
Assignee: BASF SE
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Filing: 1952-04-16
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Granted: 1956-05-08
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Expires: 1972-04-16
Abstract
No abstract record available.
Inventors
- 👤 Stastny Fritz
- 👤 Buchholz Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:19
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
61 words
A PROCESS FOR THE PRODUCTION OF A POROUS SHAPED ARTICLE FROM A SYNTHETIC THERMOPLASTIC SUBSTANCE WHICH COMPRISES INCOMPLETELY FILLING AN ENCLOSING MOLE HAVING A CAVITY OF THE DESIRED SHAPE WITH A MINOR PROPORTION OF THE MOLE VOLUME OF A FINELY DIVIDED SYNTHETIC THERMOPLASTIC SUBSTANCE CONTAINING A VOLATILE ORGANIC LIQUID ABSORBED THEREIN SAID HOMOGENEOUSLY DISPERSED THROUGHOUT THE PARTICLES THEREOF, SAID THERMOPLASTIC SUB-
Claim 2
Dependent Claim
61 words
A PROCESS FOR THE PRODUCTION OF A POROUS SHAPED ARTICLE FROM A SYNTHETIC THERMOPLASTIC SUBSTANCE WHICH COMPRISES INCOMPLETELY FILLING AN ENCLOSING MOLE HAVING A CAVITY OF THE DESIRED SHAPE WITH A MINOR PROPORTION OF THE MOLE VOLUME OF A FINELY DIVIDED SYNTHETIC THERMOPLASTIC SUBSTANCE CONTAINING A VOLATILE ORGANIC LIQUID ABSORBED THEREIN SAID HOMOGENEOUSLY DISPERSED THROUGHOUT THE PARTICLES THEREOF, SAID THERMOPLASTIC SUB-
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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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |