US3546004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing water vapor and air permeable films of polymeric material
Assignee: Carl Freudenberg KG
•
Filing: 1966-02-24
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Granted: 1970-12-08
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Expires: 1986-02-24
Abstract
No abstract record available.
Inventors
- 👤 Theodor Schachowskoy
- 👤 Jurgen Knoke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:06
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; D; D06; D06N; D06N3/00; D06N3/0086; D06N3/0088; D06N3/009; C08J2201/00; C08J2201/04; C08J2201/05; C08J2201/0502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3232819A
Cited
US3100721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |