US2576389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping tower
Assignee: Safway Steel Products Inc
•
Filing: 1945-03-22
•
Granted: 1951-11-27
•
Expires: 1965-03-22
Abstract
No abstract record available.
Inventors
- 👤 Philip B Craighead
- 👤 George H Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:00
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/18; E04H12/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US283218A
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US326336A
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US1191312A
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US1426276A
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US1684181A
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US1924506A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |