US2323461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sparkproof flooring
Assignee: FED FLOORING CORP
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Filing: 1941-10-30
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Granted: 1943-07-06
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Expires: 1961-10-30
Abstract
No abstract record available.
Inventors
- 👤 Donelson William Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/02; H05F3/025; E; E04; E04F; E04F15/00; E04F15/18; E04F15/182; E04F15/185
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) | 1946-07-05 | 1947-01-04 | 1947-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-07-05 | 1951-01-04 | 1951-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-07-05 | 1955-01-04 | 1955-07-06 | $7700.00 | Window Closed / Lapsed |