US2780890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass melting furnace
Assignee: Owens Corning
•
Filing: 1952-06-12
•
Granted: 1957-02-12
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Expires: 1972-06-12
Abstract
No abstract record available.
Inventors
- 👤 Robert G Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:13
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/09; C03B37/091; C03B37/01; C03B37/02; C03B37/0203; C03B37/0209; C03B37/081; C03B5/00; C03B5/02; C03B5/033; C03B5/0336; C03B5/16; C03B5/18; C03B5/187; C03B5/1875; C03B5/20; C03B5/207
Claims Analysis
Total Claims: 0
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US2482299A
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US2465283A
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US2485851A
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US2570078A
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US2570079A
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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) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |