US3393229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethers
Assignee: 3M Co
•
Filing: 1964-03-09
•
Granted: 1968-07-16
•
Expires: 1984-03-09
Abstract
No abstract record available.
Inventors
- 👤 Carl M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:24
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/331; C08G65/332; C08G65/3322; C08G65/3311; C08G65/3314; C08G65/3315; C08G65/3317
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2331265A
Cited
US2820808A
Cited
US2843568A
Cited
US3145191A
Cited
US3123561A
Cited
US3179682A
Cited
US3256226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |