US2989156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulating panels
Assignee: Whirlpool Corp
•
Filing: 1956-11-23
•
Granted: 1961-06-20
•
Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Frank P Brooks
- 👤 Peter E Glaser
- 👤 Pastuhov Alexis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; F25D2201/00; F25D2201/10; F25D2201/12; F25D2201/122; F25D2201/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2118659A
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US2462255A
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US2666979A
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US2708774A
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US2694906A
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US2704698A
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US2729863A
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US2718345A
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US2699583A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |