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US3400100A
Expired / Lapsed
US
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Process for the preparation of polyphenylene ethers
Assignee: N V Onderzoekingsinstituut Research Arnhem
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Filing: 1966-03-08
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Granted: 1968-09-03
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Expires: 1986-03-08
Abstract
No abstract record available.
Inventors
- 👤 Hein M Van Dort
- 👤 Cornelis R H I De Jonge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:47
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3306875A
Cited
US3260701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |