US2836589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscose heating
Assignee: Celanese Corp
•
Filing: 1954-05-17
•
Granted: 1958-05-27
•
Expires: 1974-05-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Lyman H Allen
- 👤 Robert R James
- 👤 William H Bradshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:22
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/233; B01F23/2334; B01F23/23342; B01F23/2336; B01F23/23363; B01F35/00; B01F35/90; B01F35/91; D01F; D01F2/00; D01F2/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
PROCESS FOR THE HEATING OF VISCOSE TO RAISE ITS TEMPERATURE, WHICH COMPRISES SUPPLYING A CONTINUOUS STREAM OF A VISCOSE SOLUTION TO A ZONE MAINTAINED AT SUBATMOSPHERIC PRESSURE, SUPPLYING A CONTINUOUS STREAM OF STEAM AT SUBATMOSPHERIC PRESSURE TO SAID ZONE, MIXING SAID VISCOSE SOLUTION AND SAID STEAM IN SAID ZONE AND CONDENSING SAID STEAM IN SAID VISCOSE SOLUTION WHEREBY THE LATENT HEAT OF VAPORIZATION OF SAID STEAM IS TRANSFERRED TO SAID VISCOSE SOLUTION, AND CONTINUOUSLY DISCHARGING A STEAM OF HEATED VISCOSE SOLUTION FROM SAID ZONE.
Claim 2
Dependent Claim
84 words
PROCESS FOR THE HEATING OF VISCOSE TO RAISE ITS TEMPERATURE, WHICH COMPRISES SUPPLYING A CONTINUOUS STREAM OF A VISCOSE SOLUTION TO A ZONE MAINTAINED AT SUBATMOSPHERIC PRESSURE, SUPPLYING A CONTINUOUS STREAM OF STEAM AT SUBATMOSPHERIC PRESSURE TO SAID ZONE, MIXING SAID VISCOSE SOLUTION AND SAID STEAM IN SAID ZONE AND CONDENSING SAID STEAM IN SAID VISCOSE SOLUTION WHEREBY THE LATENT HEAT OF VAPORIZATION OF SAID STEAM IS TRANSFERRED TO SAID VISCOSE SOLUTION, AND CONTINUOUSLY DISCHARGING A STEAM OF HEATED VISCOSE SOLUTION FROM SAID ZONE.
Claim 3
Dependent Claim
91 words
APPARATUS FOR HEATING A LIQUID, SAID APPARATUS COMPRISING A CONTAINER FOR LIQUID, A DUCT FOR HEATING FLUID EXTENDING INTO SAID CONTAINER FOR BRINGING SAID HEATING FLUID INTO CONTACT WITH SAID LIQUID, AND MEANS, INDEPENDENT OF SAID DUCT FOR ESTABLISHING A VORTEX IN THE LIQUID IN SAID CONTAINER AROUND SAID DUCT WHEREBY SAID LIQUID IS MAINTAINED SUBSTANTIALLY OUT OF CONTACT WITH SAID DUCT FOR A MAJOR PORTION OF THE LENGTH OF SAID DUCT, SAID DUCT HAVING AN OUTLET, DISPOSED SUBSTANTIALLY CENTRALLY OF SAID VORTEX, FOR INTRODUCING SAID HEATING FLUID INTO SAID LIQUID.
Claim 4
Dependent Claim
91 words
APPARATUS FOR HEATING A LIQUID, SAID APPARATUS COMPRISING A CONTAINER FOR LIQUID, A DUCT FOR HEATING FLUID EXTENDING INTO SAID CONTAINER FOR BRINGING SAID HEATING FLUID INTO CONTACT WITH SAID LIQUID, AND MEANS, INDEPENDENT OF SAID DUCT FOR ESTABLISHING A VORTEX IN THE LIQUID IN SAID CONTAINER AROUND SAID DUCT WHEREBY SAID LIQUID IS MAINTAINED SUBSTANTIALLY OUT OF CONTACT WITH SAID DUCT FOR A MAJOR PORTION OF THE LENGTH OF SAID DUCT, SAID DUCT HAVING AN OUTLET, DISPOSED SUBSTANTIALLY CENTRALLY OF SAID VORTEX, FOR INTRODUCING SAID HEATING FLUID INTO SAID LIQUID.
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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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |