Patent US2831709A successfully refreshed from Google Patents.
US2831709A
Expired / Lapsed
US
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Swing joint pipe coupling
Assignee: PERFECTING SERVICE CO
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Filing: 1954-09-27
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Granted: 1958-04-22
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Expires: 1974-09-27
Abstract
No abstract record available.
Inventors
- 👤 Harmon L Shaw
- 👤 Edwin C Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:44
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16L27/0804; F16L27/0837; F16L27/0845; Y; Y10; Y10S; Y10S277/00; Y10S277/91; Y10T; Y10T403/00; Y10T403/32; Y10T403/32114; Y10T403/32163; Y10T403/32172
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US318790A
Cited
DE491483C
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US359394A
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US871577A
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US1123839A
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US1285849A
Cited
US1765693A
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GB534439A
Cited
US2494598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |