US3201100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange structure for a rotary kiln
Assignee: CIMENTS DU NORD
•
Filing: 1962-07-24
•
Granted: 1965-08-17
•
Expires: 1982-07-24
Abstract
No abstract record available.
Inventors
- 👤 Dussossoy Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:47
CPC Classifications
F; F28; F28F; F28F7/00; F28F7/02; F23; F23B; F23B1/00; F27; F27B; F27B7/00; F27B7/02; F27B7/04; F27B7/14; F27B7/16; F28D; F28D7/00; F28D7/02; F23B2700/00; F23B2700/012; F27B2007/046; F27B2007/048; F28D21/00; F28D2021/0019; F28D2021/0045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A ROTARY KILN FOR THE MANUFACTURE OF CEMENT AND THE LIKE HAVING A GENERALLY CYLINDRICAL OUTER SHELL, THE COMBINATION THEREWITH OF A HEAT EXCHANGE STRUCTURE COMPRISING MEANS IN THE SHELL SUBDIVIDING IT INTO A PLURALITY OF SEPARATE CHANNELS, SAID MEANS INCLUDING A MEMBER DISPOSED IN SAID SHELL HAVING A PLURALITY OF GENERALLY RADIALLY DISPOSED FLANGES, THE FLANGES HAVING THEIR OUTER ENDS ABUTTING THE INNER WALLS OF THE SHELL AND THEIR INNER ENDS INTERCONNECTED, SAID RADIALLY DISPOSED FLANGES ON SAID MEMBER INCLUDING FIRST PORTIONS FORMING A LONGITUDINALLY EXTENDING HELIX HAVING A PITCH IN ONE DIRECTION, A SECOND PORTION FORMING A LONGITUDINALLY EXTENDING HELIX HAVING A PITCH IN THE OPPOSITE DIRECTION FROM THE PITCH OF THE HELIX OF THE FIRST PORTION, AND A GENERALLY STRAIGHT PORTION CONNECTING SAID FIRST AND SECOND PORTIONS.
Claim 2
Dependent Claim
131 words
IN A ROTARY KILN FOR THE MANUFACTURE OF CEMENT AND THE LIKE HAVING A GENERALLY CYLINDRICAL OUTER SHELL, THE COMBINATION THEREWITH OF A HEAT EXCHANGE STRUCTURE COMPRISING MEANS IN THE SHELL SUBDIVIDING IT INTO A PLURALITY OF SEPARATE CHANNELS, SAID MEANS INCLUDING A MEMBER DISPOSED IN SAID SHELL HAVING A PLURALITY OF GENERALLY RADIALLY DISPOSED FLANGES, THE FLANGES HAVING THEIR OUTER ENDS ABUTTING THE INNER WALLS OF THE SHELL AND THEIR INNER ENDS INTERCONNECTED, SAID RADIALLY DISPOSED FLANGES ON SAID MEMBER INCLUDING FIRST PORTIONS FORMING A LONGITUDINALLY EXTENDING HELIX HAVING A PITCH IN ONE DIRECTION, A SECOND PORTION FORMING A LONGITUDINALLY EXTENDING HELIX HAVING A PITCH IN THE OPPOSITE DIRECTION FROM THE PITCH OF THE HELIX OF THE FIRST PORTION, AND A GENERALLY STRAIGHT PORTION CONNECTING SAID FIRST AND SECOND PORTIONS.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |