US3440130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large celled material
Assignee: Dow Chemical Co
•
Filing: 1965-11-12
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Granted: 1969-04-22
•
Expires: 1985-11-12
Abstract
No abstract record available.
Inventors
- 👤 Maria Telkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:17
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/54; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24744; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/249974; Y10T428/249975; Y10T428/249976; Y10T428/249987; Y10T428/24999; Y10T428/29; Y10T428/2982; Y10T428/31504; Y10T428/31551; Y10T428/31645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3350823A
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US946773A
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US948541A
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US2282421A
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US2369006A
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US2767436A
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US2928456A
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US2959508A
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US2996419A
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US2806509A
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US3177109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |