Patent US2561540A successfully refreshed from Google Patents.
US2561540A
Expired / Lapsed
US
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Conduit and retaining means
Assignee: PIPING SPECIALTIES Inc
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Filing: 1948-06-16
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Granted: 1951-07-24
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Expires: 1968-06-16
Abstract
No abstract record available.
Inventors
- 👤 Walter A Sherbrooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:12
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/16; F16L3/18; F16L51/00; F16L51/02; F16L51/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1739057A
Cited
US1872089A
Cited
US2285632A
Cited
US2335478A
Cited
US2337038A
Cited
US2373439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |