US2790019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for handling and processing mineral materials having high fusing temperatures
Assignee: Owens Corning
•
Filing: 1952-06-19
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Granted: 1957-04-23
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Expires: 1972-06-19
Abstract
No abstract record available.
Inventors
- 👤 Charles J Stalego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/09; C03B37/092; C03B5/00; C03B5/16; C03B5/26; C03B5/265; C03B7/00; C03B7/08; C03B7/094; C03B7/096; C03B7/098
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |