Patent US4688553A successfully refreshed from Google Patents.
US3522997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inducer
Assignee: Congoleum Corp
•
Filing: 1968-07-01
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Granted: 1970-08-04
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Expires: 1988-07-01
Abstract
No abstract record available.
Inventors
- 👤 Eugeniusz M Rylewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:18
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/181; F04D29/22; F04D29/2261; F04D29/2277
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2368530A
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US2576700A
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US2721677A
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US2938662A
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US3071194A
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US3163119A
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US3273506A
Cited
US3200754A
Cited
US3299821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |