Patent US3018860A successfully refreshed from Google Patents.
US3018860A
Expired / Lapsed
US
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Structural element for buildings
Assignee: FARNWORTH JOHNSON CORP
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Filing: 1959-09-08
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Granted: 1962-01-30
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Expires: 1979-09-08
Abstract
No abstract record available.
Inventors
- 👤 Otis L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:48
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/16; E04B5/17; E04B5/23; E04B5/29; E04B5/48
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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |