Patent US3502231A successfully refreshed from Google Patents.
US3502231A
Expired / Lapsed
US
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Material handling system
Assignee: FKI Industries Inc
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Filing: 1969-01-02
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Granted: 1970-03-24
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Expires: 1989-01-02
Abstract
No abstract record available.
Inventors
- 👤 Warren S Raynor
- 👤 Keith A Burgess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:58
CPC Classifications
B; B65; B65G; B65G17/00; B65G17/24; B65G17/06; B65G17/063; B65G57/00; B65G57/30; B65G57/301; B65G57/303; B65G59/00; B65G59/06; B65G59/061; B65G59/062; B65G60/00; B65G2201/00; B65G2201/02; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/106; Y10S414/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3181712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |