US2249489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus
Assignee: BBC Brown Boveri AG Germany
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Filing: 1938-05-25
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Granted: 1941-07-15
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Expires: 1958-05-25
Abstract
No abstract record available.
Inventors
- 👤 Noack Walter Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:07
CPC Classifications
F; F23; F23D; F23D17/00; F23C; F23C7/00; F23C7/008; F23C7/02; F23C7/04; F23C2900/00; F23C2900/07001; F23D2207/00; F23D2900/00; F23D2900/00014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-07-14 | 1945-01-13 | 1945-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-14 | 1949-01-13 | 1949-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-14 | 1953-01-13 | 1953-07-15 | $7700.00 | Window Closed / Lapsed |