US2257267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussive tool
Assignee: Douglas Aircraft Co Inc
•
Filing: 1938-05-06
•
Granted: 1941-09-30
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Expires: 1958-05-06
Abstract
No abstract record available.
Inventors
- 👤 Agne T Lundgren
- 👤 Lan Alvsborgs
- 👤 Allan B Rogers
- 👤 Vladimir H Paviecka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:49
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/16; B21J15/18; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17094
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) | 1944-09-29 | 1945-03-31 | 1945-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-29 | 1949-03-31 | 1949-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-29 | 1953-03-31 | 1953-09-30 | $7700.00 | Window Closed / Lapsed |