Patent US3494381A successfully refreshed from Google Patents.
US3494381A
Expired / Lapsed
US
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Connecting means for trench cover plates
Assignee: Hospitality Homes
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Filing: 1966-04-06
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Granted: 1970-02-10
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Expires: 1986-04-06
Abstract
No abstract record available.
Inventors
- 👤 Frank W Fork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:48
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/48; H; H02; H02G; H02G3/00; H02G3/28; H02G3/283; H02G9/00; H02G9/06; H02G9/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1189208A
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US2043865A
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FR854137A
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FR1045430A
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US2749381A
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US3074208A
Cited
US3084480A
Cited
US3101097A
Cited
US3229029A
Cited
GB1009092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |