Patent US4975546A successfully refreshed from Google Patents.
US3235239A
Expired / Lapsed
US
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Method and apparatus for making cement
Assignee: FLSmidth and Co AS
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Filing: 1963-12-23
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Granted: 1966-02-15
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Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Petersen Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025; C; C04; C04B; C04B7/00; C04B7/36; C04B7/43; C04B7/44; C04B7/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF BURNING CEMENT RAW MEAL CONTAINING VOLATILE CONSTITUENTS WHICH COMPRISES BURNING FUEL IN A COMBUSTION SPACE, MAINTAINING A FLOW OF HOT WASTE GASES FROM THE COMBUSTION SPACE TO THE ATMOSPHERE IN A STREAM TRAVELING CONTINUOUSLY AWAY FROM THE SPACE, INTRODUCING THE RAW MEAL INTO THE STREAM TO BE ENTRAINED AND HEATED WHILE IN SUSPENSION IN THE STREAM, SEPARATING THE MEAL FROM THE STREAM, INTRODUCING THE SEPARATED MEAL INTO THE STREAM FOR ENTRAINMENT AND HEATING THEREIN AND AGAIN SEPARATING THE MEAL FROM THE STREAM, REPEATING THE STEPS OF INTRODUCING INTO THE STREAM THE MEAL SEPARATED THEREFROM AND SEPARATING THE MEAL FROM THE STREAM, THE TEMPERATURE OF THE GASES AND THE HEATING OF THE METAL THEREBY WHILE IN SUSPENSION IN THE STREAM BEING SUCH THAT THE MEAL IS SUBSTANTIALLY COMPLETELY CALCINED WHEN FINALLY
Claim 2
Independent Claim
133 words
A METHOD OF BURNING CEMENT RAW MEAL CONTAINING VOLATILE CONSTITUENTS WHICH COMPRISES BURNING FUEL IN A COMBUSTION SPACE, MAINTAINING A FLOW OF HOT WASTE GASES FROM THE COMBUSTION SPACE TO THE ATMOSPHERE IN A STREAM TRAVELING CONTINUOUSLY AWAY FROM THE SPACE, INTRODUCING THE RAW MEAL INTO THE STREAM TO BE ENTRAINED AND HEATED WHILE IN SUSPENSION IN THE STREAM, SEPARATING THE MEAL FROM THE STREAM, INTRODUCING THE SEPARATED MEAL INTO THE STREAM FOR ENTRAINMENT AND HEATING THEREIN AND AGAIN SEPARATING THE MEAL FROM THE STREAM, REPEATING THE STEPS OF INTRODUCING INTO THE STREAM THE MEAL SEPARATED THEREFROM AND SEPARATING THE MEAL FROM THE STREAM, THE TEMPERATURE OF THE GASES AND THE HEATING OF THE METAL THEREBY WHILE IN SUSPENSION IN THE STREAM BEING SUCH THAT THE MEAL IS SUBSTANTIALLY COMPLETELY CALCINED WHEN FINALLY
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |