Patent US3460873A successfully refreshed from Google Patents.
Patent US3516786A successfully refreshed from Google Patents.
US3516786A
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Method of preparing microcrystalline faujasite-type zeolite
Assignee: WR Grace and Co
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Filing: 1968-02-23
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Granted: 1970-06-23
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Expires: 1988-02-23
Abstract
No abstract record available.
Inventors
- 👤 Philip K Maher
- 👤 Julius Scherzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:10
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2838; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2882244A
Cited
US2979381A
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US3130007A
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US3185544A
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US3321272A
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US3313594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |