Patent US3377670A successfully refreshed from Google Patents.
US3377670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite car top tile
Assignee: Davis Fire Brick Co
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Filing: 1966-08-10
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Granted: 1968-04-16
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Expires: 1986-08-10
Abstract
No abstract record available.
Inventors
- 👤 Edward E Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:50
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/12; F27D3/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A KILN CAR HAVING A SUPPORTING FRAME MOUNTED ON WHEELED AXLES FOR MOVEMENT ON A KILN TRACK, SAID FRAME HAVING A BASE LAYER OF REFRACTORY CLAY BRICK AND HAVING A TOP LAYER OF REFRACTORY TILE COMPRISING TOP AND BOTTOM HALF TILE SECTIONS HAVING INTERACTING TONGUES AND GROOVES WHEN ASSEMBLED AND HAVING SIDE WALL SURFACES AND A HOLLOW CENTER PORTION SHAPED TO FORM FLUES WHEN THE TONGUE AND GROOVE PORTIONS ARE IN INTERACTING ENGAGEMENT AND WHEN THE TILE ARE MOUNTED IN ADJACENT ROWS ON THE CAR TOP.
Claim 2
Dependent Claim
86 words
A KILN CAR HAVING A SUPPORTING FRAME MOUNTED ON WHEELED AXLES FOR MOVEMENT ON A KILN TRACK, SAID FRAME HAVING A BASE LAYER OF REFRACTORY CLAY BRICK AND HAVING A TOP LAYER OF REFRACTORY TILE COMPRISING TOP AND BOTTOM HALF TILE SECTIONS HAVING INTERACTING TONGUES AND GROOVES WHEN ASSEMBLED AND HAVING SIDE WALL SURFACES AND A HOLLOW CENTER PORTION SHAPED TO FORM FLUES WHEN THE TONGUE AND GROOVE PORTIONS ARE IN INTERACTING ENGAGEMENT AND WHEN THE TILE ARE MOUNTED IN ADJACENT ROWS ON THE CAR TOP.
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) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |