US2557978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enclosed venetian blind
Assignee: Individual
•
Filing: 1945-12-28
•
Granted: 1951-06-26
•
Expires: 1965-12-28
Abstract
No abstract record available.
Inventors
- 👤 Elza L Krumm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:28
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/264; E06B9/28; E06B9/30; E06B9/32; E06B9/322; E06B2009/3222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1360560A
Cited
US2170877A
Cited
US2207516A
Cited
US2343813A
Cited
US2374591A
Cited
US2415222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |