US2884078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor blade structure having spanwise reinforcing members
Assignee: Parsons Corp
•
Filing: 1953-10-21
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Granted: 1959-04-28
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Expires: 1973-10-21
Abstract
No abstract record available.
Inventors
- 👤 Robert H Stamm
- 👤 Harry D Fox
- 👤 Steed Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:36
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49339
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB447520A
Cited
US2511858A
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US2450455A
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US2460351A
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US2589193A
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US2596818A
Cited
US2574980A
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US2470128A
Cited
US2580363A
Cited
US2694458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |