Patent US4436215A successfully refreshed from Google Patents.
Patent US2049910A successfully refreshed from Google Patents.
US2049910A
Expired / Lapsed
US
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Aeroplane
Assignee: Individual
•
Filing: 1934-10-18
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Granted: 1936-08-04
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Expires: 1954-10-18
Abstract
No abstract record available.
Inventors
- 👤 Kroll Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:40
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/38; B64C3/42; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0926; Y10T292/0928; Y10T292/0934; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0974
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) | 1939-08-04 | 1940-02-03 | 1940-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-08-04 | 1944-02-03 | 1944-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-08-04 | 1948-02-03 | 1948-08-04 | $7700.00 | Window Closed / Lapsed |