US3472819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides of the recurring benzamide unit
Assignee: EIDP Inc
•
Filing: 1967-04-03
•
Granted: 1969-10-14
•
Expires: 1987-04-03
Abstract
No abstract record available.
Inventors
- 👤 Curtis Wayne Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:59
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/12; D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; D01F6/605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2356516A
Cited
US2688011A
Cited
US3012994A
Cited
US3109836A
Cited
US3079219A
Cited
US3203933A
Cited
US3225011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |