US3216478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant gas burner tile
Assignee: Electro Refractories and Abrasives Corp
•
Filing: 1962-04-13
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Granted: 1965-11-09
•
Expires: 1982-04-13
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Saunders
- 👤 John F Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:03
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/12; F23D14/18; F23D14/181
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
137 words
A MULTI-LAYER BURNER BLOCK FOR COMBUSTIBLE GAS BURNER UNITS WHICH PERMITS PASSAGE OF COMBUSTIBLE GASES THERTHROUGH, COMPRISING: (A) A FACING LAYER MEANS OF BONDED SILICON CARBIDE GRANULES HAVING A FRONT AND A REAR FACE, THE SIZE OF SAID GRANULES AND THE POROSITY OF THE LAYER MEANS BEING SUCH THAT THE COMBUSTIBLE GASES WILL BURN AS THEY ARE PASSED THERETHROUGH; (B) A BARRIER LAYER MEANS OF BONDED CERAMIC GRANULES WHICH IS BONDED TO SAID REAR FACE OF SAID FACING LAYER MEANS AND THROUGH WHICH THE COMBUSTIBLE GASES ARE PASSED TO SAID FACING LAYER MEANS; (C) SAID CERAMIC GRANULES BEING OF SMALLER SIZE THAN SAID SILICON CARBIDE GRANULES; (D) THE PORES OF SAID BARRIER LAYER MEANS BEING SUCH THAT THE VELOCITY OF COMBUSTIBLE GASES PASSING THERETHROUGH PREVENTS THE FLAME IN SAID FACING LAYER MEANS FROM TRAVELING BACK THERETHROUGH; AND
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |