US2588976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter
Assignee: —
•
Filing: —
•
Granted: 1952-03-11
•
Expires: 1969-03-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:37
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/46; B01D33/466; B01D33/58; B01D33/70; B01D33/76; B01D33/80; B01D33/804
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US165637A
Cited
US768094A
Cited
GB190802815A
Cited
US1335695A
Cited
US1868883A
Cited
US2102780A
Cited
US2027652A
Cited
US2289762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |