Patent US3879393A successfully refreshed from Google Patents.
Patent US2132373A successfully refreshed from Google Patents.
US2132373A
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Method of making helical blades
Assignee: Turner Tanning Machinery Co
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Filing: 1937-03-29
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Granted: 1938-10-04
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Expires: 1957-03-29
Abstract
No abstract record available.
Inventors
- 👤 Edward L Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:29
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/28; B23P15/34; B23C; B23C5/00; B23C5/16; B23C5/18; Y; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S148/905; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333
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) | 1941-10-03 | 1942-04-04 | 1942-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-03 | 1946-04-04 | 1946-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-03 | 1950-04-04 | 1950-10-04 | $7700.00 | Window Closed / Lapsed |