US3260701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aromatic polyethers with lead dioxide catalyst
Assignee: Sunoco Inc
•
Filing: 1962-12-12
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Granted: 1966-07-12
•
Expires: 1982-12-12
Abstract
No abstract record available.
Inventors
- 👤 Edward J Mcnelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:14
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
METHOD FOR PREPARING AROMATIC POLYETHERS WHICH COMPRISES CONTACTING A MATERIAL HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
14 words
METHOD FOR PREPARING AROMATIC POLYETHERS WHICH COMPRISES CONTACTING A MATERIAL HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US3134753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |