US2741447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction of hollow bodies
Assignee: Individual
•
Filing: 1952-02-04
•
Granted: 1956-04-10
•
Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Lionel C Heal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/06; B64C1/061; B64C1/064; B64C1/068; B64C1/0683; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49867; Y10T29/49869
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US362107A
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US1361835A
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US1541976A
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US1866534A
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US1885406A
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US1939558A
Cited
US1942149A
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US2212456A
Cited
US2279091A
Cited
US2387219A
Cited
GB567557A
Cited
US2504422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |