US2149289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling apparatus
Assignee: Sprout Waldron & Co
•
Filing: 1936-01-29
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Granted: 1939-03-07
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Expires: 1956-01-29
Abstract
No abstract record available.
Inventors
- 👤 William F Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:27
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/06; B02C18/14; B02C18/144; D; D01; D01G; D01G11/00; D01G11/04; B02C23/00; B02C23/08; B02C23/16; B02C2023/165; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/66
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) | 1942-03-06 | 1942-09-05 | 1943-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-06 | 1946-09-05 | 1947-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-06 | 1950-09-05 | 1951-03-07 | $7700.00 | Window Closed / Lapsed |