US2821067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber construction in a gas turbine engine
Assignee: Boeing Co
•
Filing: 1956-05-28
•
Granted: 1958-01-28
•
Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Henry C Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:38
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/54; F02; F02C; F02C3/00; F02C3/14; F02C3/145
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US667744A
Cited
US2748568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |