US2881646A
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Assignee: Douglas Aircraft Co Inc
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Filing: 1955-12-23
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Granted: 1959-04-14
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Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
- 👤 Alton E Farr
- 👤 Ralph H Grimes
- 👤 Albert F Schub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
B; B25; B25B; B25B27/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49679; Y10T29/49686; Y10T29/49826; Y10T29/49908; Y10T29/49909; Y10T29/49913; Y10T29/49925; Y10T29/49934; Y10T29/53; Y10T29/53709
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) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |