Patent US4664936A successfully refreshed from Google Patents.
Patent US2444335A successfully refreshed from Google Patents.
US2444335A
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Tarpaulin sewing machine
Assignee: AMERICAN AGGREGATES Corp
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Filing: 1945-01-30
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Granted: 1948-06-29
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Expires: 1965-01-30
Abstract
No abstract record available.
Inventors
- 👤 Fred D Copock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:19
CPC Classifications
D; D05; D05B; D05B23/00; D05D; D05D2207/00; D05D2207/02; D05D2207/04; D05D2305/00; D05D2305/02; D05D2305/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US900367A
Cited
US1257900A
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US1758101A
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US2080322A
Cited
US2166350A
Cited
US2144326A
Cited
US2387185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |