Patent AT78392B successfully refreshed from Google Patents.
US3520719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intercalation of kaolinite
Assignee: BASF Catalysts LLC
•
Filing: 1967-01-13
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Granted: 1970-07-14
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Expires: 1987-01-13
Abstract
No abstract record available.
Inventors
- 👤 Norman H Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:35
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; B41M5/1555; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/259
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3224892A
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US3218182A
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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) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |