US3551352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic inorganic polymer of silicon,oxygen,and an iron group metal and method of making
Assignee: Gulf Research and Development Co
•
Filing: 1969-06-20
•
Granted: 1970-12-29
•
Expires: 1989-06-20
Abstract
No abstract record available.
Inventors
- 👤 Norman L Carr
- 👤 Harry A Hamilton
- 👤 Meredith M Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:14
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/745; B01J27/00; B01J27/02; B01J27/057; B01J27/0573; C; C10; C10G; C10G27/00; C10G27/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |