Patent US2221934A successfully refreshed from Google Patents.
US2221934A
Expired / Lapsed
US
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Pipe connection
Assignee: Starline Inc
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Filing: 1939-04-13
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Granted: 1940-11-19
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Expires: 1959-04-13
Abstract
No abstract record available.
Inventors
- 👤 Robert G Ferris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:09
CPC Classifications
F; F16; F16B; F16B7/00; B; B21; B21D; B21D39/00; B21D39/04; B21D39/044; B23; B23K; B23K9/00; B23K9/0026; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/70; Y10T403/7001
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) | 1943-11-19 | 1944-05-20 | 1944-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-19 | 1948-05-20 | 1948-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-19 | 1952-05-20 | 1952-11-19 | $7700.00 | Window Closed / Lapsed |