Patent US3472794A successfully refreshed from Google Patents.
US3472794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia synthesis catalyst
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1966-11-03
•
Granted: 1969-10-14
•
Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 James L Carter
- 👤 Charles G Savini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:34
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0411; B; B01; B01J; B01J23/00; B01J23/70; B01J37/00; B01J37/02; B01J37/0201; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |