Patent US2858000A successfully refreshed from Google Patents.
US2858000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal conveyor roller
Assignee: American Pipe and Construction Co
•
Filing: 1956-02-20
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Granted: 1958-10-28
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 Burl B Ohnstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:04
CPC Classifications
B; B65; B65G; B65G13/00; B65G13/08; B65G13/10; B65G2207/00; B65G2207/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE502510C
Cited
US2667978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |