Patent US3405894A successfully refreshed from Google Patents.
US3405894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan housing level holding structure
Assignee: Vernco Corp
•
Filing: 1967-07-31
•
Granted: 1968-10-15
•
Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 Trueman P Jordan
- 👤 Don W Weed
- 👤 Everett D Wiseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:45
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646; E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/6454; E02F3/65; E02F3/653
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |