US3549270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device
Assignee: Rolls Royce PLC
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Filing: 1969-01-10
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Granted: 1970-12-22
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Expires: 1989-01-10
Abstract
No abstract record available.
Inventors
- 👤 James Alexander Petrie
- 👤 Thomas Steel
- 👤 Michael Poucher
- 👤 Clifford John Franklin
- 👤 Denis Mccarthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:58
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/02; F01D11/025; F01D5/00; F01D5/02; F01D5/08; F01D5/081; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3448; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49934; Y10T29/53; Y10T29/53987
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |