US3398103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam plastics and process for making them
Assignee: Hoechst AG
•
Filing: 1965-05-10
•
Granted: 1968-08-20
•
Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Alfred Kuehlkamp
- 👤 Rudolf Nowack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:41
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/46; C08G12/02; C08G12/04; C08G12/20; C08G63/00; C08G63/91; C08G63/914; C08G73/00; C08G73/02; C08J; C08J9/00; C08J9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2390153A
Cited
US2326006A
Cited
US2475273A
Cited
US2755268A
Cited
US3236913A
Cited
US3311575A
Cited
US3275587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |