US2493032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gridded core material and method
Assignee: Individual
•
Filing: 1945-07-26
•
Granted: 1950-01-03
•
Expires: 1965-07-26
Abstract
No abstract record available.
Inventors
- 👤 Jr George B Rheinfrank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:32
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157; Y10T428/24174; Y10T428/24182; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249982; Y10T428/249983; Y10T428/29; Y10T428/2913; Y10T428/2915
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) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |