US3537131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for producing flexible foam polystyrene plastic bodies
Assignee: B-TECH Corp 163 WEST MERRILL ST BIRMINGHAM MI 48011 A MI CORP
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Filing: 1968-08-06
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Granted: 1970-11-03
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Expires: 1988-08-06
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Kracht
- 👤 Alvin M Sasanko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:14
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C44/02; B29C44/10; B29C44/3415; B29C44/3426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2339458A
Cited
US2744291A
Cited
US3058162A
Cited
US3163686A
Cited
US3224039A
Cited
US3239880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |