US3518219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel polyimide forming mixtures
Assignee: Monsanto Co
•
Filing: 1967-08-31
•
Granted: 1970-06-30
•
Expires: 1987-08-31
Abstract
No abstract record available.
Inventors
- 👤 Edward Lavin
- 👤 Albert H Markhart
- 👤 Robert E Kass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:46
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992; Y10T442/60; Y10T442/659; Y10T442/67
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3347808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |