US2211138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of rags for paper making
Assignee: Lawrence University
•
Filing: 1935-12-04
•
Granted: 1940-08-13
•
Expires: 1955-12-04
Abstract
No abstract record available.
Inventors
- 👤 Harry F Lewis
- 👤 Stephen I Kukolich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:55
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32; D01; D01G; D01G11/00; D01G11/04; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/66
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) | 1943-08-13 | 1944-02-12 | 1944-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-13 | 1948-02-12 | 1948-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-13 | 1952-02-12 | 1952-08-13 | $7700.00 | Window Closed / Lapsed |