US3309340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphenylene ether purification process
Assignee: General Electric Co
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Filing: 1964-03-26
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Granted: 1967-03-14
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Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 Willem F H Borman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:22
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/46; H; H03; H03K; H03K21/00; H03K23/00; H03K23/64; H03K23/66; H03K23/662; H03K23/665; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/10; H03L7/113; H03L7/16; H03L7/18; H03L7/183; H03L7/187
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A METHOD FOR PURIFYING A POLYMER FORMED OF RECURRING UNITS OF THE FORMULA
Claim 2
Independent Claim
13 words
A METHOD FOR PURIFYING A POLYMER FORMED OF RECURRING UNITS OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |