Patent US1987243A successfully refreshed from Google Patents.
US1987243A
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US
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Method and apparatus for producing paving material
Assignee: MADSEN IRON WORKS
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Filing: 1932-03-07
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Granted: 1935-01-08
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Expires: 1952-03-07
Abstract
No abstract record available.
Inventors
- 👤 Madsen Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1013; E01C19/104
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) | 1938-01-07 | 1938-07-09 | 1939-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-07 | 1942-07-09 | 1943-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-07 | 1946-07-09 | 1947-01-08 | $7700.00 | Window Closed / Lapsed |