US2836368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulverizing method and apparatus
Assignee: Texaco Inc
•
Filing: 1954-06-25
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Granted: 1958-05-27
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Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Frederic C Mccoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
B; B02; B02C; B02C23/00; A; A23; A23B; A23B2/00; A23B2/90; A23B2/92; B29; B29B; B29B13/00; B29B13/10; Y; Y10; Y10S; Y10S241/00; Y10S241/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD FOR PREPARING FINE PARTICLES FROM MUCH COARSER PARTICLES OF A SUBSTANCE IMPREGNATED WITH A LIQUID MATERIAL CHARACTERIZED BY THE ABILITY TO FREEZE TO A SOLID MATERIAL, SAID METHOD COMPRISING FREEZING SAID LIQUID MATERIAL TO A SOLID, THEREAFTER PULVERIZING SAID SUBSTANCE TO FORM FINE PARTICLES AT A LOW TEMPERATURE, AND PASSING SAID FINE PARTICLES IN HEAT EXCHANGE RELATIONSHIP WITH SAID COARSE PARTICLES AHEAD OF SAID FREEZING STEP TO PERCOOL SAID COARSE PARTICLES.
Claim 2
Independent Claim
73 words
A METHOD FOR PREPARING FINE PARTICLES FROM MUCH COARSER PARTICLES OF A SUBSTANCE IMPREGNATED WITH A LIQUID MATERIAL CHARACTERIZED BY THE ABILITY TO FREEZE TO A SOLID MATERIAL, SAID METHOD COMPRISING FREEZING SAID LIQUID MATERIAL TO A SOLID, THEREAFTER PULVERIZING SAID SUBSTANCE TO FORM FINE PARTICLES AT A LOW TEMPERATURE, AND PASSING SAID FINE PARTICLES IN HEAT EXCHANGE RELATIONSHIP WITH SAID COARSE PARTICLES AHEAD OF SAID FREEZING STEP TO PERCOOL SAID COARSE PARTICLES.
References Cited (Backward Citations)
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Cited
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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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |