US2947143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Baffle arrangement for combustion equipment
Assignee: National Research Development Corp UK
•
Filing: 1953-10-12
•
Granted: 1960-08-02
•
Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 Dudley B Spalding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:50
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28; F23R3/30; F23R3/32; F23R3/02; F23R3/26; F23R3/34; F23R3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2243467A
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US2414551A
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US2375180A
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US2503006A
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US2630679A
Cited
US2607191A
Cited
US2602292A
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US2775864A
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US2660859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |