US2944404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric dehumidifying apparatus
Assignee: 3M Co
•
Filing: 1957-04-29
•
Granted: 1960-07-12
•
Expires: 1977-04-29
Abstract
No abstract record available.
Inventors
- 👤 Robert W Fritts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:04
CPC Classifications
D; D06; D06F; D06F58/00; D06F58/20; D06F58/206; B; B01; B01D; B01D5/00; B01D5/0033; B01D5/0042; B01D53/00; B01D53/26; F; F25; F25B; F25B21/00; F25B21/02; H; H10; H10N; H10N10/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US420641A
Cited
GB190500646A
Cited
US1119011A
Cited
US1120781A
Cited
US1818437A
Cited
US2283391A
Cited
US2352056A
Cited
US2478617A
Cited
US2685608A
Cited
US2777975A
Cited
US2779172A
Cited
US2729949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |