Patent US3619263A successfully refreshed from Google Patents.
US3619263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating of ore pellets with bituminous emulsions
Assignee: Chevron USA Inc
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Filing: 1968-12-17
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Granted: 1971-11-09
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Expires: 1988-12-17
Abstract
Abstract Process for protecting ore pellets from abrasive degradation by coating them with a bituminous emulsion in an amount sufficient to deposit on the pellet surfaces from 0.1 to 0.3 percent by weight relative to the pellets of a protective coating.
Inventors
- 👤 Edward R Bremer
- 👤 Robert M Ripple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:15
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2406
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
25 words
The process of claim 1 in which the coating is carried out when the pellets are at a temperature of from 300* to 600* F.
Claim 2
Dependent Claim
19 words
The procEss of claim 1 in which the bitumen has a penetration in the range of 0 to 50.
Claim 3
Dependent Claim
17 words
The process of claim 3 in which the bitumen has a penetration in the range of 0-5.
Claim 4
Dependent Claim
20 words
The process of claim 1 in which the emulsifier used to form said emulsion of bitumen in water is anionic.
Claim 5
Dependent Claim
16 words
The process of claim 5 in which the emulsifier is a salt of a pinewood resin.
References Cited (Backward Citations)
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US2481374A
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US2869850A
Cited
US2793139A
Cited
US2999762A
Cited
US3041161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |