Patent US3473737A successfully refreshed from Google Patents.
US3473737A
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US
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Apparatus for gunning refractory material having adjustable nozzle positioning means
Assignee: NATIONAL REFRACTORIES & MINERALS Corp A CORP OF
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Filing: 1966-03-09
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Granted: 1969-10-21
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Expires: 1986-03-09
Abstract
No abstract record available.
Inventors
- 👤 Jan Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:52
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/44; C21C5/441; C21C5/443; F; F27; F27D; F27D1/00; F27D1/16; F27D1/1636; F27D1/1642
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) | 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 |