Patent US3042320A successfully refreshed from Google Patents.
US3042320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of mineral substances
Assignee: Burgess Pigment Co
•
Filing: 1958-04-22
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Granted: 1962-07-03
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Expires: 1978-04-22
Abstract
No abstract record available.
Inventors
- 👤 Malcolm S Burgess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:12
CPC Classifications
B; B02; B02C; B02C19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A METHOD FOR THE TREATMENT OF CLAYS WHICH COMPRISES SUBJECTING THE CLAY IN THE FORM OF DISCRETE PARTICLES SUSPENDED IN AN AEROFORM FLUID TO THE INFLUENCE OF
Claim 2
Independent Claim
27 words
A METHOD FOR THE TREATMENT OF CLAYS WHICH COMPRISES SUBJECTING THE CLAY IN THE FORM OF DISCRETE PARTICLES SUSPENDED IN AN AEROFORM FLUID TO THE INFLUENCE OF
References Cited (Backward Citations)
US1995803A
Cited
US2158987A
Cited
GB489610A
Cited
US2386337A
Cited
US2360893A
Cited
US2524816A
Cited
US2628785A
Cited
FR1010117A
Cited
US2613877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |