US3429819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable cellulosic insulation material
Assignee: Westinghouse Electric Corp
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Filing: 1966-07-28
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Granted: 1969-02-25
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Expires: 1986-07-28
Abstract
No abstract record available.
Inventors
- 👤 Paul A Tierney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:28
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/185; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H17/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |