US3445392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonfoaming perfluorinated polyethers
Assignee: EIDP Inc
•
Filing: 1967-05-18
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Granted: 1969-05-20
•
Expires: 1987-05-18
Abstract
No abstract record available.
Inventors
- 👤 William Henry Gumprecht
- 👤 Rulon Edward Johnson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:49
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C43/126; C08; C08G; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C10; C10M; C10M3/00; C10M2213/00; C10M2213/04; C10M2213/06; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 0
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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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |