US3112188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drying of granulated polyamides
Assignee: Inventa AG fuer Forschung und Patentverwertung
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Filing: 1959-12-14
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Granted: 1963-11-26
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Expires: 1979-12-14
Abstract
No abstract record available.
Inventors
- 👤 Zehnder Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:47
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/12; F26B17/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A DEVICE FOR THE CONTINUOUS DRYING OF GRANULATED POLYAMIDES, WHICH COMPRISES, IN COMBINATION, A DRYING TOWER SUBDIVIDED INTO THREE VERTICAL COMPARTMENTS, EACH LOWER COMPARTMENT HAVING LESSER DIAMETER AND GREATER HEIGHT THAN THE PRECEDING ONE; CHARGING MEANS FOR SAID POLYAMIDE ON TOP OF SAID TOWER; DISCHARGE MEANS FOR SAID POLYAMIDES ON THE BOTTOM OF SAID TOWER; GAS INLET MEANS NEAR THE BOTTOM OF EACH COMPARTMENT OF SAID TOWER; GAS OUTLET MEANS NEAR THE TOP OF SAID TOWER; AND COOLING AND CIRCULATING MEANS FOR SAID GAS, CONNECTING SAID GAS INLET MEANS NEAR THE BOTTOM OF THE LOWER TWO COMPARTMENTS WITH SAID GAS OUTLET MEANS NEAR THE TOP OF SAID TOWER.
Claim 2
Independent Claim
108 words
A DEVICE FOR THE CONTINUOUS DRYING OF GRANULATED POLYAMIDES, WHICH COMPRISES, IN COMBINATION, A DRYING TOWER SUBDIVIDED INTO THREE VERTICAL COMPARTMENTS, EACH LOWER COMPARTMENT HAVING LESSER DIAMETER AND GREATER HEIGHT THAN THE PRECEDING ONE; CHARGING MEANS FOR SAID POLYAMIDE ON TOP OF SAID TOWER; DISCHARGE MEANS FOR SAID POLYAMIDES ON THE BOTTOM OF SAID TOWER; GAS INLET MEANS NEAR THE BOTTOM OF EACH COMPARTMENT OF SAID TOWER; GAS OUTLET MEANS NEAR THE TOP OF SAID TOWER; AND COOLING AND CIRCULATING MEANS FOR SAID GAS, CONNECTING SAID GAS INLET MEANS NEAR THE BOTTOM OF THE LOWER TWO COMPARTMENTS WITH SAID GAS OUTLET MEANS NEAR THE TOP OF SAID TOWER.
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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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |