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US2731670A
Expired / Lapsed
US
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Removal of slag from iron distributors used in the production of mineral wool
Assignee: United States Gypsum Co
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Filing: 1951-11-01
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Granted: 1956-01-24
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Expires: 1971-11-01
Abstract
No abstract record available.
Inventors
- 👤 Richard M Downey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:51
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/04; C03B37/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2587710A
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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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |