US3445099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary kiln linings
Assignee: NATIONAL REFRACTORIES & MINERALS Corp A CORP OF
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Filing: 1968-01-22
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Granted: 1969-05-20
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Expires: 1988-01-22
Abstract
No abstract record available.
Inventors
- 👤 George Franklin Olsen
- 👤 Donald L Mcleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/14; F27B7/16; F27B7/161; F27B7/162; F23; F23M; F23M5/00; F23M5/06
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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |