US3479823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus
Assignee: Rolls Royce PLC
•
Filing: 1967-06-27
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Granted: 1969-11-25
•
Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 David Harding Parnell
- 👤 Arthur Sotheran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0066; F; F23; F23R; F23R3/00; F23R3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2417445A
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GB723010A
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US2715813A
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US2780916A
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US2799991A
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US2974488A
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US3181293A
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US3245218A
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US3292375A
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US3300976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |