US3102300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for production of porous bodies from plastics
Assignee: Ruhrchemie AG
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Filing: 1961-01-24
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Granted: 1963-09-03
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Expires: 1981-01-24
Abstract
No abstract record available.
Inventors
- 👤 Rottig Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/24; B; B29; B29C; B29C67/00; B29C67/20; B29C67/205; Y; Y10; Y10S; Y10S264/00; Y10S264/63
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A DEVICE FOR THE PRODUCTION OF POROUS BODIES FROM PLASTICS MADE FROM POLYMERS, WHICH COMPRISES, IN COMBINATION, A HORIZONTALLY ROTATABLE BASE PLATE; HEATING MEANS TO KEEP THE TEMPERATURES AT ALL POINTS ON SAID PLATE AT 50 TO 300*C., AND WITHIN LESS THAN 2*C. VARIATION; A CONTAINER FOR SAID POLYMERS, SAID CONTAINER HAVING A SEIVE BOTTOM AND BEING DISPOSED MOVABLY ABOVE SAID BASE PLATE; A TAPPING DEVICE DISPOSED ON SAID CONTAINER TO DISTRIBUTE SAID POLYMERS EVENLY ON SAID BASE PLATE; MEANS FOR MOVING SAID CONTAINER TO MAINTAIN AS EQUAL DISTANCE FROM THE SURFACE OF SAID PLATE.
References Cited (Backward Citations)
US2745141A
Cited
US2736925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |