US2433741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical dehumidifying method and means
Assignee: Individual
•
Filing: 1943-02-13
•
Granted: 1947-12-30
•
Expires: 1963-02-13
Abstract
No abstract record available.
Inventors
- 👤 Robert B P Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1417; F24F2003/144; Y; Y10; Y10S; Y10S159/00; Y10S159/23; Y10S159/27; Y10S159/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1883024A
Cited
US539975A
Cited
US1101489A
Cited
US1365422A
Cited
US1496757A
Cited
US1951281A
Cited
US2085028A
Cited
US1961495A
Cited
US2122012A
Cited
US2084997A
Cited
US2156293A
Cited
US2223586A
Cited
US2284914A
Cited
US2255069A
Cited
US2192126A
Cited
US2290465A
Cited
US2286618A
Cited
US2336456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |