US2914357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dispensing solids in polymerization mixtures
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1953-12-31
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Granted: 1959-11-24
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Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 Hans G Goering
- 👤 Helmuth G Schneider
- 👤 Philip D Spillane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:52
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A PROCESS FOR FEEDING POWDERED CATALYST TO A POLYMERIZATION REACTION ZONE WHICH COMPRISES INTRODUCING A VERTICAL STREAM OF INERT GAS INTO SAID REACTION ZONE; DIS-
Claim 2
Dependent Claim
25 words
A PROCESS FOR FEEDING POWDERED CATALYST TO A POLYMERIZATION REACTION ZONE WHICH COMPRISES INTRODUCING A VERTICAL STREAM OF INERT GAS INTO SAID REACTION ZONE; DIS-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |