US3220804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the continuous manufacture of polycondensation products
Assignee: Hoechst AG
•
Filing: 1961-12-12
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Granted: 1965-11-30
•
Expires: 1981-12-12
Abstract
No abstract record available.
Inventors
- 👤 Bachmann Ditmar
- 👤 Steinrotter Heinz
- 👤 Paszthory Emmerich
- 👤 Hoyer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:56
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/785; B; B01; B01F; B01F29/00; B01F29/60; B01F29/63; B01F33/00; B01F33/25; B01F35/00; B01F35/90; B01F35/92; B01J; B01J19/00; B01J19/18; B01J19/20; B01J19/28; B02; B02C; B02C17/00; B02C17/04; B02C17/06; B02C17/18; C08G69/00; C08G69/02; C08G69/04; B01F27/00; B01F27/05; B01F27/11; B01F27/115; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00099; B01J2219/00132; B01J2219/0015; B01J2219/00155; B01J2219/18; B01J2219/187
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A DEVICE FOR THE CONTINUOUS MANUFACTURE OF POLYCONDENSATION PRODUCTS COMPRISING A ROTATABLY MOUNTED TUBULAR VACUUM CASE HAVING AN INLET AND AN OUTLET AT OPPOSITE ENDS TO CONTAIN THE REACTION MIXTURE MELT, A PLURALITY OF ANNULAR PARTITION WALLS WITHIN SAID CASE, THE OUTER PERIPHERIES OF SAID WALLS BEING IN CONTACT WITH SAID CASE, A PLURALITY OF LOOSE BALLS WITHIN SAID CASE BETWEEN SAID WALLS FOR MIXING SAID MELT, A PLURALITY OF LIQUID CONTAINERS ADJACENT THE UNDERSIDE OF SAID CASE, SAID CASE PARTIALLY EXTENDING INTO SAID CONTAINERS, WHEREBY SAID CASE IS IMMERSED IN LIQUID WITHIN SAID CONTAINERS TO A DEPTH APPROXIMATELY EQUAL TO THE LEVEL OF THE MELT WITHIN SAID CASE, AND INDEPENDENT MEANS FOR HEATING LIQUID WITHIN SAID CONTAINERS TO DIFFERENT TEMPERATURES, WHEREBY HEAT IS PROVIDED TO SAID MELT INDIRECTLY THROUGH THE WALL OF
Claim 2
Independent Claim
133 words
A DEVICE FOR THE CONTINUOUS MANUFACTURE OF POLYCONDENSATION PRODUCTS COMPRISING A ROTATABLY MOUNTED TUBULAR VACUUM CASE HAVING AN INLET AND AN OUTLET AT OPPOSITE ENDS TO CONTAIN THE REACTION MIXTURE MELT, A PLURALITY OF ANNULAR PARTITION WALLS WITHIN SAID CASE, THE OUTER PERIPHERIES OF SAID WALLS BEING IN CONTACT WITH SAID CASE, A PLURALITY OF LOOSE BALLS WITHIN SAID CASE BETWEEN SAID WALLS FOR MIXING SAID MELT, A PLURALITY OF LIQUID CONTAINERS ADJACENT THE UNDERSIDE OF SAID CASE, SAID CASE PARTIALLY EXTENDING INTO SAID CONTAINERS, WHEREBY SAID CASE IS IMMERSED IN LIQUID WITHIN SAID CONTAINERS TO A DEPTH APPROXIMATELY EQUAL TO THE LEVEL OF THE MELT WITHIN SAID CASE, AND INDEPENDENT MEANS FOR HEATING LIQUID WITHIN SAID CONTAINERS TO DIFFERENT TEMPERATURES, WHEREBY HEAT IS PROVIDED TO SAID MELT INDIRECTLY THROUGH THE WALL OF
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |