Patent US3483974A successfully refreshed from Google Patents.
US3483974A
Expired / Lapsed
US
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Bar type screening unit with resilient edge sealing means
Assignee: Universal Oil Products Co
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Filing: 1968-02-09
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Granted: 1969-12-16
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Expires: 1988-02-09
Abstract
No abstract record available.
Inventors
- 👤 Robert P Pearsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:15
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/40; B07B1/34; B07B1/343
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA476880A
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US1380289A
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US2374775A
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US2910180A
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US2942730A
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US2924334A
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US3042206A
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US3194397A
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US3259244A
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US3363769A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |