Patent US3020003A successfully refreshed from Google Patents.
US3020003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc aircraft with gas turbine and ram jet engines
Assignee: Avro Aircraft Ltd
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Filing: 1956-07-02
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Granted: 1962-02-06
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Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Frost John Carver Meadows
- 👤 Williams Claude John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:22
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0066; B64C39/00; B64C39/001; B64C39/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |