Patent US2642781A successfully refreshed from Google Patents.
US2642781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper machinery
Assignee: Black Clawson Co
•
Filing: 1951-06-12
•
Granted: 1953-06-23
•
Expires: 1971-06-12
Abstract
No abstract record available.
Inventors
- 👤 William D Croake
- 👤 Billie D Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:48
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |