Patent US2928185A successfully refreshed from Google Patents.
US2928185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
•
Filing: —
•
Granted: 1960-03-15
•
Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:36
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/04; D21F5/00; D21F5/02; D21F5/04; D21F5/042; D21G; D21G9/00; D21G9/0063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB184557A
Cited
US1623611A
Cited
US1980558A
Cited
US1970180A
Cited
US2071015A
Cited
US2218282A
Cited
DE710353C
Cited
US2578633A
Cited
US2622343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |