US2993513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve structure
Assignee: Orenda Engines Ltd
•
Filing: 1958-07-21
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Granted: 1961-07-25
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Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 Hyde John Alan Courtney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0066; B64D; B64D33/00; B64D33/02; B64D2033/0266; B64D2033/0286; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/877; Y10T137/87788; Y10T137/87812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US162382A
Cited
US362917A
Cited
US1237364A
Cited
GB340236A
Cited
FR997961A
Cited
FR1025715A
Cited
US2774554A
Cited
US2879014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |