US3433588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of 4 angstrom unit zeolites
Assignee: Produits Chimiques Pechiney Saint Gobain
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Filing: 1965-03-17
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Granted: 1969-03-18
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Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Max Michel
- 👤 Denis Papee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:31
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2815; Y; Y10; Y10S; Y10S423/00; Y10S423/24
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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |