US2319225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Ewing Development Co
•
Filing: 1941-01-13
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Granted: 1943-05-18
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Expires: 1961-01-13
Abstract
No abstract record available.
Inventors
- 👤 John J Grebe
- 👤 Walkley B Ewing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:48
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; Y; Y10; Y10S; Y10S160/00; Y10S160/07; Y10S52/00; Y10S52/02; Y10T; Y10T29/00; Y10T29/18; Y10T29/185; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24281; Y10T428/24298; Y10T428/24314
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-05-17 | 1946-11-16 | 1947-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-17 | 1950-11-16 | 1951-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-17 | 1954-11-16 | 1955-05-18 | $7700.00 | Window Closed / Lapsed |