Patent US2817389A successfully refreshed from Google Patents.
US2817389A
Expired / Lapsed
US
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Bleacher seats
Assignee: FRED MEDART Manufacturing CO
•
Filing: 1952-02-18
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Granted: 1957-12-24
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Expires: 1972-02-18
Abstract
No abstract record available.
Inventors
- 👤 Archer W Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:36
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/10; E04H3/12; E04H3/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US148350A
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US1452467A
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US1580522A
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US1978494A
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US2246057A
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US2183056A
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US2171374A
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US2297101A
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US2611422A
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US2588783A
Cited
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 |