US3419220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nozzles for abrasive-laden slurry
Assignee: Gulf Research and Development Co
•
Filing: 1966-11-30
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Granted: 1968-12-31
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Expires: 1986-11-30
Abstract
No abstract record available.
Inventors
- 👤 Robert J Goodwin
- 👤 Joseph L Pekarek
- 👤 Paul W Schaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/60; E21B10/61; B; B24; B24C; B24C5/00; B24C5/02; B24C5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |