Patent US2541849A successfully refreshed from Google Patents.
US2541849A
Expired / Lapsed
US
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Process for manufacturing hollow tools
Assignee: Individual
•
Filing: 1947-08-08
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Granted: 1951-02-13
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Expires: 1967-08-08
Abstract
No abstract record available.
Inventors
- 👤 Villeneuve Louis Jean Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/06; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1285589A
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US1208164A
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US1409753A
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US2325973A
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US2405298A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |