US3548923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling and heating apparatus of heat storage type
Assignee: Panasonic Holdings Corp
•
Filing: 1968-12-06
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Granted: 1970-12-22
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Expires: 1988-12-06
Abstract
No abstract record available.
Inventors
- 👤 Kazuhiro Nakano
- 👤 Kouichiro Yamaguchi
- 👤 Kunihiko Utsunomiya
- 👤 Shigeru Tanimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:06
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F5/0017; F24F5/0003; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/1923; G05D23/275; Y; Y02; Y02E; Y02E60/00; Y02E60/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |