US2828841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional tower
Assignee: Wind Turbine Co
•
Filing: 1949-11-04
•
Granted: 1958-04-01
•
Expires: 1969-11-04
Abstract
No abstract record available.
Inventors
- 👤 Robert W Weeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:55
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/02; E04H12/08; E04H12/10; H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1242; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5761; Y10T403/5766; Y10T403/5781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB365077A
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US1941952A
Cited
US2271472A
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US2194810A
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US2449056A
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US2404276A
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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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |