US2593050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite fire door
Assignee: OI Glass Inc
•
Filing: 1952-01-24
•
Granted: 1952-04-15
•
Expires: 1972-01-24
Abstract
No abstract record available.
Inventors
- 👤 Hubert W Paul
- 👤 Everett C Shuman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:30
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/10; E06B5/16; Y; Y10; Y10T; Y10T428/00; Y10T428/17; Y10T428/18; Y10T428/183
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US826549A
Cited
US1590132A
Cited
US1875888A
Cited
US2157622A
Cited
US1919702A
Cited
US2173808A
Cited
US2354725A
Cited
US2469379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |