Patent US2518981A successfully refreshed from Google Patents.
US2518981A
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Assignee: Allan Edwards Inc
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Filing: 1948-12-06
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Granted: 1950-08-15
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Expires: 1968-12-06
Abstract
No abstract record available.
Inventors
- 👤 Allan J Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:20
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/12; F16L1/20; F16L1/24; E; E02; E02B; E02B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR743207A
Cited
US867945A
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US912318A
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US1182872A
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US1569660A
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US1877094A
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US2335433A
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US2373439A
Cited
US2453804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |