US2563117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for increasing the opacity of sheets or webs of paper, or the like
Assignee: North American Paper Process Co Inc
•
Filing: 1947-11-05
•
Granted: 1951-08-07
•
Expires: 1967-11-05
Abstract
No abstract record available.
Inventors
- 👤 Albert B Hurley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:46
CPC Classifications
B; B41; B41F; B41F17/00; B41F33/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1969707A
Cited
US1969465A
Cited
US2339204A
Cited
US2398435A
Cited
US2448292A
Cited
US2425914A
Cited
US2396391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |