US2817281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-circulating parasol for protection against dust, insects and sun
Assignee: Individual
•
Filing: 1954-07-12
•
Granted: 1957-12-24
•
Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Schwan
- 👤 Clyde W Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:31
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00357; B60H1/00378; B60J; B60J7/00; B60J7/08; B62; B62D; B62D33/00; B62D33/06; B62D33/0617; B62D33/0625; Y; Y10; Y10S; Y10S55/00; Y10S55/29
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) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |