Patent US3397502A successfully refreshed from Google Patents.
US3397502A
Expired / Lapsed
US
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Composite truss structure
Assignee: Reynolds Metals Co
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Filing: 1966-11-10
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Granted: 1968-08-20
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Expires: 1986-11-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Eric Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:35
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/06; E04C3/07; E04C3/29; E04C3/292; E04C2003/0404; E04C2003/0408; E04C2003/0421; E04C2003/0426; E04C2003/043; E04C2003/0443; E04C2003/0447; E04C2003/0486; E04C2003/0491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1101189A
Cited
US1602283A
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US1824076A
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US1621299A
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US1837706A
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US1951810A
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US2031765A
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US2082159A
Cited
US2377427A
Cited
US3129493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |