US2238939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blasting assembly
Assignee: EIDP Inc
•
Filing: 1939-01-21
•
Granted: 1941-04-22
•
Expires: 1959-01-21
Abstract
No abstract record available.
Inventors
- 👤 Lewis Harold Arthur
- 👤 Wilson Fred Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:16
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/02; A; A01; A01G; A01G9/00; A01G9/24; A01G9/246; F24; F24F; F24F7/00; F24F7/007; F42B; F42B3/00; F42D3/00; F42D3/06; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
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) | 1944-04-21 | 1944-10-21 | 1945-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-21 | 1948-10-21 | 1949-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-21 | 1952-10-21 | 1953-04-22 | $7700.00 | Window Closed / Lapsed |