US2719010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing finely divided products from inorganic relatively porous plastic material
Assignee: Sinclair Refining Co
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Filing: 1950-05-19
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Granted: 1955-09-27
•
Expires: 1970-05-19
Abstract
No abstract record available.
Inventors
- 👤 Erickson Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:52
CPC Classifications
B; B01; B01J; B01J37/00; B01J21/00; C; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C09; C09K; C09K23/00; C09K23/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD OF PREPARING FINELY-DIVIDED PARTICLES WHICH COMPRISES TREATING AN INORGANIC RELATIVELY POROUS PLASTIC MATERIAL WITH A WATER SOLUTION CONTAINING A SMALL AMOUNT OF A HYDROPHILIC PORTION, REMOVING THE PHOBIC PORTION AND A HYDROPHILIC PORTION, REMOVING THE FREE WATER, DRYING THE WASHED MATERIAL AT ELEVATED TEMPERATURES TO REMOVE ANY RESIDUAL WATER, AND FRAGMENTING THE DRIED MATERIAL.
Claim 2
Independent Claim
56 words
THE METHOD OF PREPARING FINELY-DIVIDED PARTICLES WHICH COMPRISES TREATING AN INORGANIC RELATIVELY POROUS PLASTIC MATERIAL WITH A WATER SOLUTION CONTAINING A SMALL AMOUNT OF A HYDROPHILIC PORTION, REMOVING THE PHOBIC PORTION AND A HYDROPHILIC PORTION, REMOVING THE FREE WATER, DRYING THE WASHED MATERIAL AT ELEVATED TEMPERATURES TO REMOVE ANY RESIDUAL WATER, AND FRAGMENTING THE DRIED MATERIAL.
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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) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |