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Patent US2657716A successfully refreshed from Google Patents.
US2657716A
Expired / Lapsed
US
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Inflatable fabric segment of curved configuration
Assignee: Wingfoot Corp
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Filing: 1950-10-28
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Granted: 1953-11-03
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Expires: 1970-10-28
Abstract
No abstract record available.
Inventors
- 👤 Charles J Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:59
CPC Classifications
D; D03; D03D; D03D1/00; D03D1/02; E; E04; E04H; E04H15/00; E04H15/20; E04H2015/202; E04H2015/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US569712A
Cited
US1206696A
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US1285391A
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US1671642A
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US1976793A
Cited
GB439029A
Cited
US2194860A
Cited
GB598960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |