Patent US2993582A successfully refreshed from Google Patents.
US2993582A
Expired / Lapsed
US
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Conveyor system
Assignee: Armstrong World Industries Inc
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Filing: 1957-02-28
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Granted: 1961-07-25
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Expires: 1977-02-28
Abstract
No abstract record available.
Inventors
- 👤 Chester E Souser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:34
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/52; B65G47/64; B65G47/644; B65G47/645; B65G47/647
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |