US2500815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flying stage
Assignee: GERLI
•
Filing: 1947-03-10
•
Granted: 1950-03-14
•
Expires: 1967-03-10
Abstract
No abstract record available.
Inventors
- 👤 David C Gerli
- 👤 Edward G Dawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:29
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/42; B; B66; B66F; B66F11/00; B66F11/04; B66F11/044; E02F9/00; E02F9/08; E02F9/10; E02F9/12; E02F9/121; E06; E06C; E06C5/00; E06C5/02; Y; Y10; Y10S; Y10S414/00; Y10S414/13
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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |