Patent GB540685A successfully refreshed from Google Patents.
US2343747A
Expired / Lapsed
US
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Machine for making tubular structures
Assignee: Individual
•
Filing: 1941-05-27
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Granted: 1944-03-07
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Expires: 1961-05-27
Abstract
No abstract record available.
Inventors
- 👤 Abel E Chernack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:21
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; B29C53/30; B29C53/305; B21; B21F; B21F17/00; B29D; B29D23/00; B29D23/001; F; F16; F16L; F16L11/00; F16L11/14; F16L11/16; B29C53/56; B29C53/58; B29C63/00; B29C63/02; B29C63/04; B29C63/06; B29C63/065; B29L; B29L2009/00; B29L2009/003; Y; Y10; Y10S; Y10S264/00; Y10S264/40; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013; Y10T29/00; Y10T29/53; Y10T29/53126
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) | 1947-03-07 | 1947-09-06 | 1948-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-07 | 1951-09-06 | 1952-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-07 | 1955-09-06 | 1956-03-07 | $7700.00 | Window Closed / Lapsed |