US2944047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer slurry
Assignee: —
•
Filing: —
•
Granted: 1960-07-05
•
Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S159/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD OF PRODUCING COLOR-FREE SOLID OLEFINIC POLYMERS FROM POLYMER PARTICLES OF A MONO-OLEFIN HAVING 2 TO 5 CARBON ATOMS IN THE MOLECULE, SAID POLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE FROM ABOUT 10,000 TO ABOUT 1,000,000 FORMED IN A SLURRY IN A NON-POLAR ORGANIC LIQUID WHICH COMPRISES THE STEPS OF SEPARATING SAID LIQUID FROM SAID SLURRY TO RECOVER SAID POLYMER PARTICLES, THEN APPLYING BY SQUEEZING SAID POLYMER PARTICLES TO REMOVE ANY OF SAID LIQUID FROM AND TO REDUCE THE SURFACE AREA OF THE POLYMER TO LESS THAN 1 M.2/G., SAID STEPS BEING PERFORMED WHILE MAINTAINING SAID SLURRY AND POLYMER PARTICLES FREE OF OXYGEN-CONTAINING GAS, AND RECOVERING SAID POLYMER FREE OF OXYGEN-CONTAINING GAS AND HAVING A LOW SURFACE AREA LESS THAN 1 M.3/G AFTER APPLICATION OF SAID PRESSURE, SAID LOW SURFACE AREA POLYMER REMAINING SUBSTANTIALLY FREE OF COLOR ON FURTHER TREATMENT.
Claim 2
Independent Claim
142 words
A METHOD OF PRODUCING COLOR-FREE SOLID OLEFINIC POLYMERS FROM POLYMER PARTICLES OF A MONO-OLEFIN HAVING 2 TO 5 CARBON ATOMS IN THE MOLECULE, SAID POLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE FROM ABOUT 10,000 TO ABOUT 1,000,000 FORMED IN A SLURRY IN A NON-POLAR ORGANIC LIQUID WHICH COMPRISES THE STEPS OF SEPARATING SAID LIQUID FROM SAID SLURRY TO RECOVER SAID POLYMER PARTICLES, THEN APPLYING BY SQUEEZING SAID POLYMER PARTICLES TO REMOVE ANY OF SAID LIQUID FROM AND TO REDUCE THE SURFACE AREA OF THE POLYMER TO LESS THAN 1 M.2/G., SAID STEPS BEING PERFORMED WHILE MAINTAINING SAID SLURRY AND POLYMER PARTICLES FREE OF OXYGEN-CONTAINING GAS, AND RECOVERING SAID POLYMER FREE OF OXYGEN-CONTAINING GAS AND HAVING A LOW SURFACE AREA LESS THAN 1 M.3/G AFTER APPLICATION OF SAID PRESSURE, SAID LOW SURFACE AREA POLYMER REMAINING SUBSTANTIALLY FREE OF COLOR ON FURTHER TREATMENT.
References Cited (Backward Citations)
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US2825721A
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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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |