US3830756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noble metal catalysts
Assignee: WR Grace and Co Conn
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Filing: 1972-08-04
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Granted: 1974-08-20
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Expires: 1992-08-04
Abstract
Abstract THE PRESENT INVENTION IS CONCERNED WITH CATALYSTS IN WHICH THE ACTIVE COMPONENTS ARE HIGHLY DISPERSED AND STABLE NOBLE METALS. IN ONE SPECIFIC ASPECT, THE INVENTION DEALS WITH CATALYST USEFUL IN THE REDUCTION OR ELIMINATION OF NOXIOUS COMPONENTS IN AUTO EXHAUST GASES. IN ANOTHER SPECIFIC ASPECT, THE INVENTION DEALS WITH THE STABILIZATION OF NOBLE METALS BY SELECTED SUPPORTS.
Inventors
- 👤 J Graham
- 👤 M Sanchez
- 👤 J Maselli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:41
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J23/63; B01J35/00; B01J35/30; B01J35/391; B01J35/392; B01J35/393; B01J35/70; B01J35/77; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/20; B01D2255/206; B01D2255/2061; B01D2255/2065; B01D2255/2066; B01D2255/207; B01D2255/20707; B01D2255/20715; B01D2255/90; B01D2255/92; B01D2255/9202; B01D2255/9207; B01J2235/00; B01J2235/15; B01J37/00; B01J37/0009; B01J37/0018
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |