US3547840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of insulating materials having low specific gravity
Assignee: Individual
•
Filing: 1969-01-13
•
Granted: 1970-12-15
•
Expires: 1989-01-13
Abstract
No abstract record available.
Inventors
- 👤 Fritz Stastny
- 👤 Rudolf Gaeth
- 👤 Bernhard Schmitt
- 👤 Udo Haardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/22; C08J9/228; C08J9/236; C08J9/33; C08J2201/00; C08J2201/02; C08J2201/038; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; C08J2327/00; C08J2327/02; C08J2327/04; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3429836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |