Patent US3477388A successfully refreshed from Google Patents.
US3477388A
Expired / Lapsed
US
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Entrance switch for power and free conveyors
Assignee: FKI Industries Inc
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Filing: 1966-03-03
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Granted: 1969-11-11
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Expires: 1986-03-03
Abstract
No abstract record available.
Inventors
- 👤 Paul Klamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:50
CPC Classifications
E; E01; E01B; E01B25/00; E01B25/22; E01B25/26; B; B61; B61B; B61B10/00; B61B10/02; B61B10/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |