US3336716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace combustion chamber with a transverse composition differential
Assignee: Johns Manville Corp
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Filing: 1963-07-10
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Granted: 1967-08-22
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Expires: 1983-07-10
Abstract
No abstract record available.
Inventors
- 👤 Scheppers Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:08
CPC Classifications
F; F23; F23M; F23M5/00; C; C04; C04B; C04B28/00; C04B28/24; C04B28/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A FILTER MOLDED FURNACE COMBUSTION CHAMBER FORMED BY A CHAMBER WALL MEMBER COMPRISING REFRACTORY FIBER AND INORGANIC BINDER, THE WALL MEMBER BEING SUBSTANTIALLY UNIFORMLY THROUGHOUT OF A HETEROGENEOUS COMPOSITION TRANSVERSELY THROUGH ITS THICKNESS FROM THE INNER SURFACE OF THE WALL FORMING THE CHAMBER TO THE OUTER SURFACE OF THE WALL FORMING THE CHAMBER AND HAVING A MAXIMUM CONCENTRATION OF THE SAID INORGANIC BINDER ACCUMULATED IN THE AREA ADJACENT AND APPROXIMATELY CONTERMINOUS THE OUTERMOST SURFACE OF THE WALL FORMING THE COMBUSTION CHAMBER PROVIDING A RELATIVELY NON-POROUS AND HIGH DENSITY, HARD, STRONG EXTERNAL SURFACE AREA, AND A MAXIMUM CONCENTRATION OF THE REFRACTORY FIBER ACCUMULATED IN THE AREA ADJACENT AND APPROXIMATELY CONTERMINOUS THE INNER-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |