Patent US3402509A successfully refreshed from Google Patents.
US3402509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separable check means for a balanced door
Assignee: Ellison Bronze Co Inc
•
Filing: 1966-10-28
•
Granted: 1968-09-24
•
Expires: 1986-10-28
Abstract
No abstract record available.
Inventors
- 👤 Ernest O Hagiund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:22
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/04; E05D; E05D15/00; E05D15/28; E05D15/30; E05D7/00; E05D7/08; E05D7/081; E05Y; E05Y2900/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3124848A
Cited
US2019527A
Cited
US2082455A
Cited
US2059143A
Cited
US2637877A
Cited
US3266191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |