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Patent US3433861A successfully refreshed from Google Patents.
US3433861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dyed,shaped oxymethylene polymers
Assignee: Celanese Corp
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Filing: 1966-01-12
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Granted: 1969-03-18
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Expires: 1986-01-12
Abstract
No abstract record available.
Inventors
- 👤 Robert L Hamilton
- 👤 Richard G Quynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:29
CPC Classifications
D; D06; D06P; D06P7/00; D06P7/005; D01; D01F; D01F1/00; D01F1/02; D01F1/06; D01F6/00; D01F6/58; D01F6/66; D02; D02J; D02J1/00; D02J1/22; D02J1/221; D06P3/00; D06P3/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2778058A
Cited
US2844598A
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US3027352A
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US3241906A
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US3330897A
Cited
US3134636A
Cited
GB937798A
Cited
DE1234919B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |