US3379654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of epoxygroup containing prepolymers from polyepoxy compounds
Assignee: BASF Schweiz AG
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Filing: 1964-10-14
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Granted: 1968-04-23
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Expires: 1984-10-14
Abstract
No abstract record available.
Inventors
- 👤 Seiz Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:47
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069; C07F7/00; C07F7/003; C08; C08G; C08G59/00; C08G59/02; C08G59/18; C08G59/68; C08G59/681; C08G59/682; C08G59/70
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |