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US3501324A
Expired / Lapsed
US
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Manufacturing aqueous slurry of hydrous calcium silicate and products thereof
Assignee: Ohara Inc
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Filing: 1967-06-27
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Granted: 1970-03-17
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Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 Kazuhiko Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:08
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/22; C01B33/24; C04; C04B; C04B28/00; C04B28/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2540354A
Cited
US3116158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |