Patent CH403526A successfully refreshed from Google Patents.
Patent US2625994A successfully refreshed from Google Patents.
US2625994A
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US
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Gas burner formed by stacked annular members
Assignee: Allis Chalmers Corp
•
Filing: 1946-01-09
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Granted: 1953-01-20
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Expires: 1966-01-09
Abstract
No abstract record available.
Inventors
- 👤 Shepherd Dean
- 👤 Harry J Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:10
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/48; F23D14/58; F23D2203/00; F23D2203/10; F23D2203/108; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49348
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US422166A
Cited
US554020A
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US1324619A
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FR448482A
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US1341089A
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CH116805A
Cited
US1567622A
Cited
GB251907A
Cited
US1681698A
Cited
US2235635A
Cited
US2284616A
Cited
US2385528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |