US3425162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door hanger and track construction
Assignee: WILLIAMSBURG STEEL PRODUCTS CO
•
Filing: 1966-05-04
•
Granted: 1969-02-04
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Expires: 1986-05-04
Abstract
No abstract record available.
Inventors
- 👤 Ernst Halpern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:08
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/06; E05D15/0621; E05D15/0626; E05D15/063; E05D15/0634; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/604; E05Y2201/606; E05Y2201/61; E05Y2201/612; E05Y2201/614; E05Y2201/622; E05Y2201/638; E05Y2201/688; E05Y2201/706; E05Y2600/00; E05Y2600/10; E05Y2600/20; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10S; Y10S16/00; Y10S16/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1907144A
Cited
FR724032A
Cited
CH293035A
Cited
US2904848A
Cited
US3105272A
Cited
GB990057A
Cited
US3339223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |