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US2982532A
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US
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Dust collector system for gypsum kettle
Assignee: UNION GYPSUM Co
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Filing: 1959-05-18
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Granted: 1961-05-02
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Expires: 1979-05-18
Abstract
No abstract record available.
Inventors
- 👤 Leo B Hakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:48
CPC Classifications
C; C04; C04B; C04B11/00; C04B11/02; C04B11/028; B; B01; B01D; B01D53/00; B01D53/34; F; F23; F23J; F23J11/00
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |