Patent US3473481A successfully refreshed from Google Patents.
US3473481A
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US
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Venturi arrangement
Assignee: BORGERUD Manufacturing Co Inc
•
Filing: 1966-03-18
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Granted: 1969-10-21
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Expires: 1986-03-18
Abstract
No abstract record available.
Inventors
- 👤 Earl P Brane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:07
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/312; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87643
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2264539A
Cited
US2690717A
Cited
US2766910A
Cited
US2764452A
Cited
DE1101076B
Cited
US3194254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |