US3493449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of molded foam articles from polyurethanes
Assignee: Carl Freudenberg KG
•
Filing: 1966-01-10
•
Granted: 1970-02-03
•
Expires: 1986-01-10
Abstract
No abstract record available.
Inventors
- 👤 Hans Dietrich Krug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:21
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/58; B29C44/588; B29C44/02; B29C44/12; B29C44/1209; B29C33/00; B29C33/10; B29C33/38; B29C33/40; B29C33/405; B29K; B29K2075/00; B29L; B29L2031/00; B29L2031/48; B29L2031/50; B29L2031/504
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3175936A
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US1610286A
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US2140063A
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US2256329A
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US2217137A
Cited
US2429486A
Cited
US3170832A
Cited
US2956310A
Cited
US3170827A
Cited
US3166227A
Cited
US3222443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |