US3374058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a crystalline zeolite
Assignee: WR Grace and Co
•
Filing: 1964-12-08
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Granted: 1968-03-19
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Expires: 1984-12-08
Abstract
No abstract record available.
Inventors
- 👤 Carl V Mcdaniel
- 👤 Philip K Maher
- 👤 William E Waxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:01
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2838; C01B33/2853; Y; Y10; Y10S; Y10S423/00; Y10S423/21
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |