US3317439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst aggregates of crystallites
Assignee: EIDP Inc
•
Filing: 1965-10-21
•
Granted: 1967-05-02
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:10
CPC Classifications
B; B01; B01J; B01J37/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AS A CATALYST, AGGREGATES OF CRYSTALLITES OF A CATALYTIC MATERIAL HAVING AN ULTIMATE PARTICLE NO GREATER THAN 1500 ANGSTROMS WHICH ARE KEPT APART BY CRYSTALLITES OF A FIRST REFRACTORY WHICH MELTS ABOVE 1000*C., TO SAID AGGREGATES, CRYSTALLITES OF A SECOND REFRACTORY WHICH MELTS
Claim 2
Dependent Claim
43 words
AS A CATALYST, AGGREGATES OF CRYSTALLITES OF A CATALYTIC MATERIAL HAVING AN ULTIMATE PARTICLE NO GREATER THAN 1500 ANGSTROMS WHICH ARE KEPT APART BY CRYSTALLITES OF A FIRST REFRACTORY WHICH MELTS ABOVE 1000*C., TO SAID AGGREGATES, CRYSTALLITES OF A SECOND REFRACTORY WHICH MELTS
References Cited (Backward Citations)
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Cited
US1864628A
Cited
US2265682A
Cited
US2865844A
Cited
US3033801A
Cited
US3044966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |