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US3401536A
Expired / Lapsed
US
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Apparatus for melting and processing heat-softenable mineral materials
Assignee: Owens Corning
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Filing: 1965-08-20
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Granted: 1968-09-17
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 Hellmut I Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:07
CPC Classifications
F; F27; F27D; F27D27/00; C; C03; C03B; C03B37/00; C03B37/08; C03B37/081
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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |