US3510331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for processing clay and product thereof
Assignee: BASF Catalysts LLC
•
Filing: 1967-06-21
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Granted: 1970-05-05
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Expires: 1987-06-21
Abstract
No abstract record available.
Inventors
- 👤 Gerhardt Talvenheimo
- 👤 Robert J Bergmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:37
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C04B33/06; C04B33/30; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40
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) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |