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US2490677A
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Aqueous dispersion of a salt of an n-monoalkyl substituted polymeric amic acid
Assignee: EIDP Inc
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Filing: 1946-04-19
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Granted: 1949-12-06
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Expires: 1966-04-19
Abstract
No abstract record available.
Inventors
- 👤 Martin E Cupery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:53
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/02; C09D5/024; C09D5/027; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T442/00; Y10T442/20; Y10T442/2213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1976679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |