Patent US3389549A successfully refreshed from Google Patents.
US3389549A
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Aromatic dicarbonyl sulfonate modified polycarbonamides
Assignee: EIDP Inc
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Filing: 1966-01-17
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Granted: 1968-06-25
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Expires: 1986-01-17
Abstract
No abstract record available.
Inventors
- 👤 Israel A David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:18
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/42; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/2486
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2325972A
Cited
US2623806A
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US2798281A
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US2922690A
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US3184436A
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US3039990A
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US3142662A
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US3101522A
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US3105732A
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US3296204A
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US3177644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |