Patent US3025884A successfully refreshed from Google Patents.
US3025884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct outlet with adjustment for floor level
Assignee: HK Porter Co Inc
•
Filing: 1956-04-17
•
Granted: 1962-03-20
•
Expires: 1976-04-17
Abstract
No abstract record available.
Inventors
- 👤 Johnson Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:45
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/14; E; E04; E04F; E04F19/00; E04F19/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US740663A
Cited
US1533759A
Cited
US1949883A
Cited
US2043648A
Cited
US2657250A
Cited
US2763294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |