US3440215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyimides
Assignee: General Electric Co
•
Filing: 1965-03-17
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Granted: 1969-04-22
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Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Fred F Holub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:32
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/89; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14; H01B3/307
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |