Patent US3433322A successfully refreshed from Google Patents.
US3433322A
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Monolithic acoustic structural building element
Assignee: Internationella Siporex AB
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Filing: 1965-04-14
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Granted: 1969-03-18
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Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 Karl Gustav Olsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:30
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/044; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8263; E04B2001/8457; E04B2001/8476; E04B2001/848; E04B2001/849
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR960223A
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US1483365A
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US1825770A
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US2003309A
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US2067312A
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US2127867A
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US2615525A
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US2840179A
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US3087576A
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US3074505A
Cited
FR1263131A
Cited
US3269484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |