US3740194A
Expired / Lapsed
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Adiabatic calorimetry
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-04-24
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Granted: 1973-06-19
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Expires: 1990-04-24
Abstract
Abstract A MEANS FOR CONTROLLING MONOMER FEEDING WHEN MAKING HOMOGENEOUS COPOLYMERS INVOLVES THE DETERMINATION OF THE RATE OF REACTION DURING THE PROCESS USING ADIABATIC CALORIMETRY. A SMALL SAMPLE IS ISOLATED FROM THE REACTION MIXTURE AND MAINTAINED UNDER ADIABATIC CONDITIONS FOR A SHORT PERIOD, WHILE THE REACTION RATE IS DETERMINED FROM THE RATE OF CHANGE OF TEMPERATURE OF THE SAMPLE. THE SAMPLE IS THEN RETURNED TO THE REACTION MIXTURE. BOTH INTERMITTENT AND CONTINUOUS SAMPLING ARE EXEMPLIFIED.
Inventors
- 👤 B Hendy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:04
CPC Classifications
C; C08; C08F; C08F2/00; B; B01; B01J; B01J19/00; B01J19/0006; G; G01; G01N; G01N25/00; G01N25/20; G01N25/48; G01N31/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |