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 12:19
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
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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 |