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Patent US3424223A successfully refreshed from Google Patents.
US3424223A
Expired / Lapsed
US
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Door reinforcing assembly for vertically operating doors
Assignee: Celotex Corp
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Filing: 1967-10-19
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Granted: 1969-01-28
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Expires: 1987-10-19
Abstract
No abstract record available.
Inventors
- 👤 Melvin H Rosenblatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:46
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/16; E05D15/24; E05D13/00; E05D13/10; E05D13/12; E05D13/1207; E05D13/1215; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |