US3057702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preparation of condensation polymers
Assignee: EIDP Inc
•
Filing: 1953-05-11
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Granted: 1962-10-09
•
Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Pierce Norwin Caley
- 👤 Ryder David Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:12
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; B01F; B01F27/00; B01F27/60; B01F27/625; C; C08; C08G; C08G63/00; C08G63/78; C08G63/785; B01F35/00; B01F35/50; B01F35/53; B01F35/531
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
APPARATUS COMPRISING A VESSEL WITH A GENERALLY CYLINDRICAL INTERIOR HAVING ITS LONG AXIS SUBSTANTIALLY HORIZONTAL AND PROVIDED WITH HEATING MEANS, AN INLET AND OUTLET FOR VISCOUS MATERIAL AT OPPOSITE ENDS OF THE VESSEL AND AN OUTLET AT THE TOP OF THE VESSEL FOR REMOVING VOLATILE MATERIAL, A ROTATABLE SHAFT SUBSTANTIALLY CONCENTRIC WITH THE CYLINDRICAL AXIS AND CARRYING AFFIXED THERETO IN A PLURALITY OF DISCONTINUOUS FLIGHTS A SCREW OF RADIUS APPROACHING THE CYLINDER RADIUS, AND AT LEAST ONE CIRCULAR FORAMINOUS MEMBER OF RADIUS CLOSELY APPROACHING THE CYLINDER RADIUS AFFIXED CONCENTRICALLY TO THE SHAFT BETWEEN ADJACENT SCREW FLIGHTS.
Claim 2
Dependent Claim
96 words
APPARATUS COMPRISING A VESSEL WITH A GENERALLY CYLINDRICAL INTERIOR HAVING ITS LONG AXIS SUBSTANTIALLY HORIZONTAL AND PROVIDED WITH HEATING MEANS, AN INLET AND OUTLET FOR VISCOUS MATERIAL AT OPPOSITE ENDS OF THE VESSEL AND AN OUTLET AT THE TOP OF THE VESSEL FOR REMOVING VOLATILE MATERIAL, A ROTATABLE SHAFT SUBSTANTIALLY CONCENTRIC WITH THE CYLINDRICAL AXIS AND CARRYING AFFIXED THERETO IN A PLURALITY OF DISCONTINUOUS FLIGHTS A SCREW OF RADIUS APPROACHING THE CYLINDER RADIUS, AND AT LEAST ONE CIRCULAR FORAMINOUS MEMBER OF RADIUS CLOSELY APPROACHING THE CYLINDER RADIUS AFFIXED CONCENTRICALLY TO THE SHAFT BETWEEN ADJACENT SCREW FLIGHTS.
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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) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |