Patent US3441253A successfully refreshed from Google Patents.
US3441253A
Expired / Lapsed
US
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Assignee: WILLIAM J HORGAN JR
•
Filing: 1967-03-31
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Granted: 1969-04-29
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Expires: 1987-03-31
Abstract
No abstract record available.
Inventors
- 👤 Louis Blum
- 👤 William J Horgan Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:09
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1836; E04F11/1838; E04F2011/1868; E04F2011/187; Y; Y10; Y10T; Y10T403/00; Y10T403/55; Y10T403/557; Y10T403/70; Y10T403/7062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1926798A
Cited
US2238561A
Cited
US2417654A
Cited
US2433617A
Cited
GB694053A
Cited
US2950015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |