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Patent US2641628A successfully refreshed from Google Patents.
US2641628A
Expired / Lapsed
US
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Pothead
Assignee: PITTSBURGH DES MOINES Co
•
Filing: 1948-04-05
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Granted: 1953-06-09
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Expires: 1968-04-05
Abstract
No abstract record available.
Inventors
- 👤 James O Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:34
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/02; H02G15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US251729A
Cited
US266353A
Cited
DE372343C
Cited
US1176739A
Cited
US1152005A
Cited
US1802584A
Cited
US1889545A
Cited
US1996646A
Cited
US1974298A
Cited
US2179781A
Cited
US2253981A
Cited
US2247671A
Cited
US2295214A
Cited
US2323792A
Cited
US2329961A
Cited
CH239442A
Cited
US2381218A
Cited
US2439394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |