US3531897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible gasket strip construction
Assignee: Draftex GmbH
•
Filing: 1967-03-22
•
Granted: 1970-10-06
•
Expires: 1987-03-22
Abstract
No abstract record available.
Inventors
- 👤 Erich Weimar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:05
CPC Classifications
B; B60; B60J; B60J10/00; B60J10/30; B60J10/32; B60J10/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2954310A
Cited
US3167856A
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US3222769A
Cited
FR1356712A
Cited
FR1406912A
Cited
US3363364A
Cited
US3310928A
Cited
FR1420106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |