US3438945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antimony oxysulfide as a polycondensation catalyst
Assignee: FMC Corp
•
Filing: 1966-11-15
•
Granted: 1969-04-15
•
Expires: 1986-11-15
Abstract
No abstract record available.
Inventors
- 👤 Mary J Stewart
- 👤 John A Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/85; C08G63/86; C08G63/866
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3055870A
Cited
US3360500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |