US3506618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hexafluorosilicate additives in polyester preparation
Assignee: FMC Corp
•
Filing: 1966-11-14
•
Granted: 1970-04-14
•
Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Mary E Carter
- 👤 John A Price
- 👤 Robert P Mervine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/85; C08G63/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3228913A
Cited
FR1385050A
Cited
US3346542A
Cited
US3356641A
Cited
US3395127A
Cited
US3329651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |