Patent US4900904A successfully refreshed from Google Patents.
Patent US2807934A successfully refreshed from Google Patents.
US2807934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame tube support for a gas turbine combustion system
Assignee: AV Roe Canada Ltd
•
Filing: 1951-12-06
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Granted: 1957-10-01
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Expires: 1971-12-06
Abstract
No abstract record available.
Inventors
- 👤 Purvis Joseph Thompson
- 👤 Secord Lloyd Calvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:24
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/60
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |