US2844855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing castings with one or more internal passages
Assignee: Bristol Aero Engines Ltd
•
Filing: 1954-11-01
•
Granted: 1958-07-29
•
Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Gadd Ernest Reginald
- 👤 Tedds Dennis Frederick Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:46
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1243471A
Cited
US1416412A
Cited
US1710534A
Cited
US1912889A
Cited
US2074007A
Cited
US2085324A
Cited
US2166634A
Cited
US2274580A
Cited
US2294959A
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GB549016A
Cited
US2362875A
Cited
CH238186A
Cited
US2479039A
Cited
GB610494A
Cited
US2510735A
Cited
US2687278A
Cited
US2665881A
Cited
US2679669A
Cited
US2609576A
Cited
CH287296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |