Patent US3268478A successfully refreshed from Google Patents.
US3268478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Meta-polyphenoxylene polymers
Assignee: General Electric Co
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Filing: 1962-01-02
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Granted: 1966-08-23
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Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Gordon P Brown
- 👤 Roswell J Blackinton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:18
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
UNSUBSTITUTED LINEAR HOMOPOLYMERS HAVING A MINIMUM MOLECULAR WEIGHT OF 2000 AS DETERMINED BY VAPOR PRESSURE OSMOMETRY AND HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
21 words
UNSUBSTITUTED LINEAR HOMOPOLYMERS HAVING A MINIMUM MOLECULAR WEIGHT OF 2000 AS DETERMINED BY VAPOR PRESSURE OSMOMETRY AND HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
US3134753A
Cited
FR1238643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |