US2528145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window operating system
Assignee: Trico Products Corp
•
Filing: 1945-03-16
•
Granted: 1950-10-31
•
Expires: 1965-03-16
Abstract
No abstract record available.
Inventors
- 👤 Erwin C Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; E05F15/57; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/55
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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |