Patent US3009546A successfully refreshed from Google Patents.
US3009546A
Expired / Lapsed
US
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Self-erecting tower structure
Assignee: Pittsburgh Des Moines Steel Co
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Filing: 1960-06-10
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Granted: 1961-11-21
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Expires: 1980-06-10
Abstract
No abstract record available.
Inventors
- 👤 Sr Lloyd E Anderson
- 👤 Banfield R Capron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:20
CPC Classifications
E; E04; E04G; E04G1/00; E04G1/18; E04H; E04H12/00; E04H12/18; E04H12/187; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20588
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |