US2863634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shroud ring construction for turbines and compressors
Assignee: Napier Turbochargers Ltd
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Filing: 1955-12-07
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Granted: 1958-12-09
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Expires: 1975-12-07
Abstract
No abstract record available.
Inventors
- 👤 Chamberlin Reginald He Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:51
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/02; F01D9/04; F01D9/042; F01D11/00; F01D11/08; F01D25/00; F01D25/24; F01D25/246; F05; F05D; F05D2240/00; F05D2240/10; F05D2240/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |