US3436879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: LOUIE C DUKE
•
Filing: 1966-07-13
•
Granted: 1969-04-08
•
Expires: 1986-07-13
Abstract
No abstract record available.
Inventors
- 👤 Louie C Duke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:07
CPC Classifications
E; E04; E04H; E04H1/00; E04H1/12; E04H1/1272; G; G09; G09F; G09F15/00; G09F15/0068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US282794A
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FR1093345A
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US766373A
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US1012855A
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US1327248A
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US1484231A
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FR592578A
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US2049857A
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US2193207A
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US2315158A
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US3005277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |