Patent US2977402A successfully refreshed from Google Patents.
US2977402A
Expired / Lapsed
US
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Utility wire mast
Assignee: Utility Service Co Inc
•
Filing: 1954-10-01
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Granted: 1961-03-28
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Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
- 👤 Everett R Parkison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:36
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE293916C
Cited
US377953A
Cited
US497996A
Cited
US2123379A
Cited
US2183251A
Cited
US2384338A
Cited
GB610325A
Cited
US2685353A
Cited
US2714496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |