Patent US3520834A successfully refreshed from Google Patents.
US3520834A
Expired / Lapsed
US
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Foamable molding composition
Assignee: Mitsubishi Chemical Corp
•
Filing: 1967-08-18
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Granted: 1970-07-21
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Expires: 1987-08-18
Abstract
No abstract record available.
Inventors
- 👤 Kunio Mizutani
- 👤 Takaaki Ito
- 👤 Kenyu Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:44
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; C08J2423/00; Y; Y10; Y10S; Y10S264/00; Y10S264/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3320188A
Cited
US3224984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |