US1909109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window shade slat
Assignee: Individual
•
Filing: 1932-01-06
•
Granted: 1933-05-16
•
Expires: 1952-01-06
Abstract
No abstract record available.
Inventors
- 👤 Carl E Kopfstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:26
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/40; E06B9/42; E06B9/02; E06B9/08; E06B9/11; E06B9/17; E06B9/17046
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) | 1936-05-15 | 1936-11-14 | 1937-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-15 | 1940-11-14 | 1941-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-15 | 1944-11-14 | 1945-05-16 | $7700.00 | Window Closed / Lapsed |