Patent US3415027A successfully refreshed from Google Patents.
US3415027A
Expired / Lapsed
US
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Truss of spaced pyramidal units
Assignee: Butler Manufacturing Co
•
Filing: 1965-07-30
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Granted: 1968-12-10
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Expires: 1985-07-30
Abstract
No abstract record available.
Inventors
- 👤 Marvin K Snyder
- 👤 James E Bradley
- 👤 Raymond L Cowie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:18
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/19; E04B2001/1924; E04B2001/1936; E04B2001/1951; E04B2001/1978; E04B2001/1981; E04B2001/1984; E04B2001/199; E04B2001/1993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2284898A
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US2433677A
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US2939554A
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US2920357A
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FR1234093A
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FR76525E
Cited
AT225909B
Cited
US3270478A
Cited
US3049196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |