Patent US3528948A successfully refreshed from Google Patents.
US3528948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyurethanes
Assignee: ELASTOMER AG
•
Filing: 1968-09-11
•
Granted: 1970-09-15
•
Expires: 1988-09-11
Abstract
No abstract record available.
Inventors
- 👤 Franz Gottfried Reuter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/73; C08G18/28; C08G18/65; C08G18/6505; C08G18/6511
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2729618A
Cited
US2871218A
Cited
US2953539A
Cited
GB919406A
Cited
US3211701A
Cited
US3214411A
Cited
US3248370A
Cited
GB1002520A
Cited
NL6404808A
Cited
GB1075274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |