Patent US2840092A successfully refreshed from Google Patents.
US2840092A
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Assignee: Individual
•
Filing: 1955-02-01
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Granted: 1958-06-24
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Expires: 1975-02-01
Abstract
No abstract record available.
Inventors
- 👤 Edward J Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:40
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/003; E04H15/32; E04H15/62; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3427; Y10T24/3439; Y10T24/344; Y10T24/3445; Y10T24/3467; Y10T24/3483
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315497A
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CH29764A
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US1089803A
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US1531957A
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US1730733A
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US1854671A
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US2036033A
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US2134879A
Cited
US2554688A
Cited
US2660186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |