Patent US3497211A successfully refreshed from Google Patents.
US3497211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gliding surface and glider for use therewith
Assignee: Individual
•
Filing: 1967-11-08
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Granted: 1970-02-24
•
Expires: 1987-11-08
Abstract
No abstract record available.
Inventors
- 👤 Harry S Nagin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:18
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/10; E01C13/12; A; A63; A63C; A63C1/00; A63C19/00; A63C19/10; A63B; A63B21/00; A63B21/00047
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |