US2731820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber treating tank
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:36
CPC Classifications
D; D01; D01C; D01C1/00; D01C1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US112275A
Cited
US300010A
Cited
US410744A
Cited
US473266A
Cited
US776069A
Cited
US824121A
Cited
GB191108097A
Cited
US1103671A
Cited
US1121023A
Cited
US1230198A
Cited
US1263045A
Cited
US1664475A
Cited
US2149708A
Cited
GB449456A
Cited
US2268590A
Cited
US2292629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |