US2224248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing the crush strength of paper
Assignee: Individual
•
Filing: 1939-07-10
•
Granted: 1940-12-10
•
Expires: 1959-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert J Blum
- 👤 Maurice W Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:50
CPC Classifications
G; G01; G01N; G01N3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-12-10 | 1944-06-10 | 1944-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-10 | 1948-06-10 | 1948-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-10 | 1952-06-10 | 1952-12-10 | $7700.00 | Window Closed / Lapsed |