US3475596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus for storing and releasing heat
Assignee: Hooker Chemical Corp
•
Filing: 1967-11-13
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Granted: 1969-10-28
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Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Willis Thompson Lawrence
- 👤 George Warren Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:23
CPC Classifications
F; F24; F24H; F24H7/00; F24H7/02; F24H7/04; F24H7/0408; F24H7/0433; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; F24H1/00; F24H1/22; F24H1/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2808494A
Cited
US2743347A
Cited
US2859945A
Cited
US2911513A
Cited
GB1049534A
Cited
US3356834A
Cited
US3400249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |