US3356519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose ether composition
Assignee: Dow Chemical Co
•
Filing: 1964-02-28
•
Granted: 1967-12-05
•
Expires: 1984-02-28
Abstract
No abstract record available.
Inventors
- 👤 William C Chambers
- 👤 Lee Milford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1775179A
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US2663989A
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US2879268A
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US2842451A
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US2834777A
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US3072635A
Cited
US3108890A
Cited
US3297583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |