Patent US3480387A successfully refreshed from Google Patents.
US3480387A
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US
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Method for producing gypsum pellets
Assignee: Central Glass Co Ltd
•
Filing: 1967-05-01
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Granted: 1969-11-25
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Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Yoshito Yasutake
- 👤 Yosisige Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:27
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C01; C01F; C01F11/00; C01F11/46; C04B22/00; C04B22/08; C04B22/14; C04B22/142; C04B22/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2044942A
Cited
US1973473A
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US2207416A
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US2177254A
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US3262799A
Cited
US3326635A
Cited
US3359146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |