US2521591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for converting crushed material
Assignee: Individual
•
Filing: 1945-06-01
•
Granted: 1950-09-05
•
Expires: 1965-06-01
Abstract
No abstract record available.
Inventors
- 👤 Warren S Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:07
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; F; F27; F27B; F27B21/00; F27B21/06; F27B9/00; F27B9/14; F27B9/147; F27B9/20; F27B9/24; F27B9/2453
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US299204A
Cited
US1690555A
Cited
US59989A
Cited
US849873A
Cited
US939936A
Cited
US929765A
Cited
US1283483A
Cited
US1688422A
Cited
US2041844A
Cited
US2019963A
Cited
US2103234A
Cited
US2041811A
Cited
US2041810A
Cited
US2174066A
Cited
US2316664A
Cited
US2343337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |