US2448800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window shade
Assignee: Individual
•
Filing: 1945-04-17
•
Granted: 1948-09-07
•
Expires: 1965-04-17
Abstract
No abstract record available.
Inventors
- 👤 Harju Walter Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:52
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/36; Y; Y10; Y10S; Y10S160/00; Y10S160/90; Y10S160/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE186128C
Cited
US1708636A
Cited
US2135647A
Cited
US2207393A
Cited
US2377746A
Cited
US2386695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |