US3477962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Palladium-lead catalysts
Assignee: Pfizer Inc
•
Filing: 1966-05-06
•
Granted: 1969-11-11
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Expires: 1986-05-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Kardys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:38
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; B01J23/38; B01J23/54; B01J23/56; B01J23/62; B01J23/622; B01J23/628; C; C07; C07C; C07C403/00; C07C403/06; C07C403/08; C07C2601/00; C07C2601/12; C07C2601/16; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10S; Y10S502/00; Y10S502/514
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2681938A
Cited
US2857337A
Cited
US2836613A
Cited
US2967200A
Cited
US3425792A
Cited
US3380934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |