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US2553442A
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Arrangement of labyrinth packing for a rotary type of fluid-pressure apparatus
Assignee: Armstrong Siddeley Motors Ltd
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Filing: 1947-01-17
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Granted: 1951-05-15
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Expires: 1967-01-17
Abstract
No abstract record available.
Inventors
- 👤 Clark Thomas
- 👤 Atkins John Harry Clapham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:46
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/02; F16; F16J; F16J15/00; F16J15/44; F16J15/447; F16J15/4472
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US752340A
Cited
US738574A
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AT74422B
Cited
US1267229A
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US2283131A
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US2452782A
Cited
US2497151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |