Patent US2839081A successfully refreshed from Google Patents.
US2554430A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1948-03-22
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Granted: 1951-05-22
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Expires: 1968-03-22
Abstract
No abstract record available.
Inventors
- 👤 Lemuel R Vines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:48
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/06; E04G17/07; E04G17/0707; E04G17/0721
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1875366A
Cited
US871879A
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US1597424A
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US2095714A
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US2099260A
Cited
US2190700A
Cited
US2378850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |