US2701950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion device and check valve therefor
Assignee: Swingfire Bahamas Ltd
•
Filing: 1952-07-26
•
Granted: 1955-02-15
•
Expires: 1972-07-26
Abstract
No abstract record available.
Inventors
- 👤 Ludwig R Huber
- 👤 Franz A Haag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:35
CPC Classifications
F; F23; F23C; F23C15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US618904A
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US948132A
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GB189410227A
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US771327A
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US1021521A
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FR541372A
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DE485466C
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US1956691A
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US2068248A
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US2193243A
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GB594098A
Cited
US2609660A
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US2576637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |