US2789639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method useful in the manufacture of venetian blinds
Assignee: LORENTZEN HARDWARE Manufacturing CORP
•
Filing: 1950-09-09
•
Granted: 1957-04-23
•
Expires: 1970-09-09
Abstract
No abstract record available.
Inventors
- 👤 Hans K Lorentzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:54
CPC Classifications
B; B23; B23D; B23D23/00; E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/266; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/404; Y10T83/412; Y10T83/748; Y10T83/7593; Y10T83/7607; Y10T83/7613
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |