USRE21729E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating fibrous material
Assignee: —
•
Filing: —
•
Granted: 1941-02-25
•
Expires: 1958-02-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:38
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/144; D06M11/00; D06M11/77; D06M11/79; D06M13/02; D06M13/152; D06M13/244; D06M13/248; D06M13/256; D06M13/262; D06M2200/00; D06M2200/40
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) | 1944-02-25 | 1944-08-26 | 1945-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-25 | 1948-08-26 | 1949-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-25 | 1952-08-26 | 1953-02-25 | $7700.00 | Window Closed / Lapsed |