US2581783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced door organization with pressure release
Assignee: Ellison Bronze Co Inc
•
Filing: 1948-03-24
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Granted: 1952-01-08
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Expires: 1968-03-24
Abstract
No abstract record available.
Inventors
- 👤 Wilmot S Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:31
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/48; E05D15/28; E05D15/30; E05Y; E05Y2800/00; E05Y2800/74; E05Y2800/742; E05Y2800/746; E05Y2900/00; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2019528A
Cited
US2530263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |