US2859668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming pulp stock into a sheet
Assignee: Library and Archives Canada
•
Filing: 1956-07-02
•
Granted: 1958-11-11
•
Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Martin J Berlyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:22
CPC Classifications
D; D21; D21F; D21F1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA464219A
Cited
US1101725A
Cited
US1880688A
Cited
US1968028A
Cited
US2329799A
Cited
US2344281A
Cited
US2451305A
Cited
GB672955A
Cited
US2664033A
Cited
US2737857A
Cited
US2757581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |