Patent US3442850A successfully refreshed from Google Patents.
US3442850A
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US
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Oxymethylene polymer compositions containing carbon black
Assignee: Celanese Corp
•
Filing: 1966-06-30
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Granted: 1969-05-06
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Expires: 1986-06-30
Abstract
No abstract record available.
Inventors
- 👤 Merrill N O'brien Jr
- 👤 Frank M Berardinelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:11
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3020264A
Cited
DE1152541B
Cited
US3262908A
Cited
US3102106A
Cited
US3210322A
Cited
US3261805A
Cited
US3222316A
Cited
US3314918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |