Patent US3721580A successfully refreshed from Google Patents.
US3721580A
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Surface treatment polymer structures
Assignee: General Electric Co
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Filing: 1971-03-31
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Granted: 1973-03-20
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Expires: 1991-03-31
Abstract
Abstract THE SURFACE CHARACTERISTICS OF PARTS COMPOSED OF OR CONTAINING AN AROMATIC CARBOCYLIC POLYMER ARE IMPROVED BY CONTACTING THE SURFACE WITH AN IMIDO-ALKYLENE COMPOUND AND A FRIEDEL-CRAFTS'' ALKYLATION CATALYST IN THE PRESENCE OF A SELECTED MIXTURE OF SOLVENTS HAVING A LIMITED SOLUBILITY FOR THE POLYMER TO EFFECT A REACTION OF THE IMIDO-ALKYLENE COMPOUND WITH THE POLYMER SURFACE.
Inventors
- 👤 G Trott
- 👤 J Starita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:32
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |