US3002622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for treating paper pulp stock to vary the consistency thereof
Assignee: Individual
•
Filing: 1958-02-04
•
Granted: 1961-10-03
•
Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Wilfred F Mathewson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:07
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US65716A
Cited
US892825A
Cited
GB147356A
Cited
US1451522A
Cited
US1717604A
Cited
US1843791A
Cited
US1945492A
Cited
GB425314A
Cited
US2450838A
Cited
US2653521A
Cited
US2525701A
Cited
US2678733A
Cited
US2748951A
Cited
US2796809A
Cited
US2833413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |