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Patent US2835322A successfully refreshed from Google Patents.
US2835322A
Expired / Lapsed
US
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Firing head for furnaces
Assignee: Individual
•
Filing: 1955-11-07
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Granted: 1958-05-20
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Expires: 1975-11-07
Abstract
No abstract record available.
Inventors
- 👤 Sr Leonard Vignere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:32
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US547473A
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US971561A
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US1132722A
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US1522064A
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US1822844A
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US1987487A
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US2231042A
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GB556136A
Cited
US2475240A
Cited
US2660230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |