Patent US3293330A successfully refreshed from Google Patents.
US3293330A
Expired / Lapsed
US
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Fluidized process for calcining particulate limestone
Assignee: Pfizer Inc
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Filing: 1962-12-21
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Granted: 1966-12-20
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Expires: 1982-12-21
Abstract
No abstract record available.
Inventors
- 👤 Frank S White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:56
CPC Classifications
C; C04; C04B; C04B2/00; C04B2/10; C04B2/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2498710A
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US2567959A
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US2650084A
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US2634119A
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US2670193A
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US2665971A
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US2671102A
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US2684840A
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US2763599A
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US2874950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |