Patent US2854243A successfully refreshed from Google Patents.
US2854243A
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Assignee: PRODUCT ENGINEERING Co
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Filing: 1956-02-20
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Granted: 1958-09-30
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 Charles T Freeling
- 👤 Lloyd R Fitzsimmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:00
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/02; B62B5/00; B62B5/04; B62B5/0457; B62B5/0461
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1693633A
Cited
FR342886A
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US2582435A
Cited
US2659612A
Cited
US2598046A
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US2725240A
Cited
US2775464A
Cited
US2772890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |