US3522628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of cellular thermoplastic materials
Assignee: Saint Gobain Isover G+H AG
•
Filing: 1968-04-29
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Granted: 1970-08-04
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Expires: 1988-04-29
Abstract
No abstract record available.
Inventors
- 👤 Hans Eberle
- 👤 Gerhard Wuttke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:14
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/03; Y; Y10; Y10S; Y10S264/00; Y10S264/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23839E
Cited
US3123860A
Cited
US2653349A
Cited
US2872703A
Cited
US3263276A
Cited
US3239883A
Cited
US3243848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |