Patent US3483992A successfully refreshed from Google Patents.
US3483992A
Expired / Lapsed
US
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Reinforced oval-form tubular screens
Assignee: Universal Oil Products Co
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Filing: 1967-12-11
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Granted: 1969-12-16
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Expires: 1987-12-11
Abstract
No abstract record available.
Inventors
- 👤 Paul W Fournier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:57
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/088; B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/19; B01D29/21; B01D29/44; B01D29/48; B01D35/00; B01D35/14; B01D35/143; B01D35/153; B21; B21F; B21F17/00; B21F27/00; B21F27/12; B21F27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US806416A
Cited
GB191305552A
Cited
US2081198A
Cited
US2046458A
Cited
US2126938A
Cited
US2383672A
Cited
US3200952A
Cited
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 |