US2831845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of powdered polymers and copolymers of ethylene
Assignee: Union Carbide Corp
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Filing: 1955-06-28
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Granted: 1958-04-22
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Expires: 1975-06-28
Abstract
No abstract record available.
Inventors
- 👤 John W Biddle
- 👤 James M Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:56
CPC Classifications
B; B29; B29B; B29B13/00; B29B9/00; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE PRODUCTION OF A POWDERED POLYMER OF ETHYLENE COMPRISING THE STEPS OF PROVIDING IN A HIGH PRESSURE, HIGH TEMPERATURE ZONE A MOLTEN REACTION PRODUCT CONTAINING THE POLYMER TOGETHER WITH UNREACTED GASEOUS MONOMER, REMOVING THE REACTION PRODUCT FROM SAID ZONE AND ATOMIZING SAID REACTION PRODUCT BY RELEASING SUCH PRODUCT TO SUBSTANTIALLY ATMOSPHERIC PRESSURE THEREBY CONVERTING THE MOLTEN MASS INTO A HIGH TEMPERATURE HIGH VELOCITY JET STREAM, AND INJECTING THE ATOMIZED REACTION PRODUCT-CONTAINING JET STREAM INTO A QUENCHING FLUID STREAM TO RAPIDLY COOL AND FREEZE THE ATOMIZED REACTION PRODUCT, THEREBY FORMING A SEPARABLE FINELY POWDERED POLYMER.
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE PRODUCTION OF A POWDERED POLYMER OF ETHYLENE COMPRISING THE STEPS OF PROVIDING IN A HIGH PRESSURE, HIGH TEMPERATURE ZONE A MOLTEN REACTION PRODUCT CONTAINING THE POLYMER TOGETHER WITH UNREACTED GASEOUS MONOMER, REMOVING THE REACTION PRODUCT FROM SAID ZONE AND ATOMIZING SAID REACTION PRODUCT BY RELEASING SUCH PRODUCT TO SUBSTANTIALLY ATMOSPHERIC PRESSURE THEREBY CONVERTING THE MOLTEN MASS INTO A HIGH TEMPERATURE HIGH VELOCITY JET STREAM, AND INJECTING THE ATOMIZED REACTION PRODUCT-CONTAINING JET STREAM INTO A QUENCHING FLUID STREAM TO RAPIDLY COOL AND FREEZE THE ATOMIZED REACTION PRODUCT, THEREBY FORMING A SEPARABLE FINELY POWDERED POLYMER.
References Cited (Backward Citations)
GB609560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |