Patent US3521824A successfully refreshed from Google Patents.
US3521824A
Expired / Lapsed
US
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Air-liquid flat spray nozzle
Assignee: Delavan Manufacturing Co
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Filing: 1968-10-11
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Granted: 1970-07-28
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Expires: 1988-10-11
Abstract
No abstract record available.
Inventors
- 👤 Richard L Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:33
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/04; B05B7/0416; B05B7/0441; B05B7/0458; B05B7/0075; B05B7/08; B05B7/0807; B05B7/0861; B05B7/0892; F; F23; F23D; F23D11/00; F23D11/10; F23D11/106; F23D11/12; F23D11/14; F24; F24F; F24F6/00; F24F6/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1438239A
Cited
US2425710A
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US2569251A
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US2522928A
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US2647801A
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US2745701A
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US3172457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |