US3307612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convergent-stream grid-type gas burner
Assignee: 3M Co
•
Filing: 1964-04-06
•
Granted: 1967-03-07
•
Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Stack Thomas Noel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:53
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/72; F23D14/82; F23D14/12; F23D14/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A BURNER ASSEMBLY FOR THE COMBUSTION OF A GASEOUS COMBUSTIBLE MIXTURE COMPRISING, IN COMBINATION, (A) A CASING GENERALLY ENCLOSING A CHAMBER AND HAVING AN INLET FOR GASEOUS COMBUSTIBLE MIXTURE; (B) AN ELONGATED REFRACTORY CONVERGENT-STREAM BURNER GRID, BETWEEN SAID INLET AND SAID CHAMBER, HAVING TWO DIVERGING LONGITUDINAL LEGS GIVING A GENERALLY V-SHAPED CROSS-SECTION AND CONSISTING ESSENTIALLY OF CORRUGATED SHEETS HAVING THE AXES OF CORRUGATION OF CONSECUTIVE SHEETS RESPECTIVELY TRANSVERSE OF DIFFERENT LEGS OF SAID GRID; AND
Claim 2
Dependent Claim
75 words
A BURNER ASSEMBLY FOR THE COMBUSTION OF A GASEOUS COMBUSTIBLE MIXTURE COMPRISING, IN COMBINATION, (A) A CASING GENERALLY ENCLOSING A CHAMBER AND HAVING AN INLET FOR GASEOUS COMBUSTIBLE MIXTURE; (B) AN ELONGATED REFRACTORY CONVERGENT-STREAM BURNER GRID, BETWEEN SAID INLET AND SAID CHAMBER, HAVING TWO DIVERGING LONGITUDINAL LEGS GIVING A GENERALLY V-SHAPED CROSS-SECTION AND CONSISTING ESSENTIALLY OF CORRUGATED SHEETS HAVING THE AXES OF CORRUGATION OF CONSECUTIVE SHEETS RESPECTIVELY TRANSVERSE OF DIFFERENT LEGS OF SAID GRID; 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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |