US2306781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product containing siliceous fibers and method of making the same
Assignee: Sylvania Industrial Corp
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Filing: 1941-07-17
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Granted: 1942-12-29
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Expires: 1961-07-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Carleton S Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/18; D04H1/42; D04H1/4209; D04H1/4382; D04H1/43835; Y; Y10; Y10S; Y10S264/00; Y10S264/75; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/24926; Y10T442/00; Y10T442/60; Y10T442/69; Y10T442/692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-12-28 | 1946-06-29 | 1946-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-28 | 1950-06-29 | 1950-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-28 | 1954-06-29 | 1954-12-29 | $7700.00 | Window Closed / Lapsed |