Patent US3490813A successfully refreshed from Google Patents.
US3490813A
Expired / Lapsed
US
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Conveyance of material requiring hygienic disposal
Assignee: Envac Centrlasug AB
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Filing: 1967-07-26
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Granted: 1970-01-20
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Expires: 1987-07-26
Abstract
No abstract record available.
Inventors
- 👤 Olof Henrik Hallstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:54
CPC Classifications
B; B65; B65G; B65G51/00; B65G51/02; B65F; B65F5/00; B65F5/005; E; E04; E04F; E04F17/00; E04F17/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US851054A
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US1048477A
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US1112151A
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US1965866A
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US2153984A
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US2199894A
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US2276805A
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US3316026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |