Patent US2637877A successfully refreshed from Google Patents.
US2637877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced door
Assignee: Ellison Bronze Co Inc
•
Filing: 1948-04-20
•
Granted: 1953-05-12
•
Expires: 1968-04-20
Abstract
No abstract record available.
Inventors
- 👤 Petter M Hanssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:20
CPC Classifications
E; E05; E05F; E05F5/00; E05F5/02; E05D; E05D15/00; E05D15/28; E05D15/30; 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)
US1141485A
Cited
US2019527A
Cited
US2019528A
Cited
US2092531A
Cited
US2189233A
Cited
US2449686A
Cited
US2449687A
Cited
US2479597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |