US2933885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat storage accumulator systems and method and equipment for operating the same
Assignee: MELBA L BENEDEK INDIVIDUALLY
•
Filing: 1952-05-31
•
Granted: 1960-04-26
•
Expires: 1972-05-31
Abstract
No abstract record available.
Inventors
- 👤 Vago Paul
- 👤 Melba L Benedek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:13
CPC Classifications
F; F01; F01K; F01K3/00; F24; F24D; F24D11/00; F24D11/002; F24D11/003; F28; F28D; F28D20/00; F28D20/02; F28D20/021; F28D20/0034; F28D2020/0047; Y; Y02; Y02B; Y02B10/00; Y02B10/20; Y02E; Y02E60/00; Y02E60/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1790555A
Cited
US290851A
Cited
US1094301A
Cited
US1251262A
Cited
US1119063A
Cited
GB102388A
Cited
US1338644A
Cited
US1425174A
Cited
US1877762A
Cited
US1922509A
Cited
GB366528A
Cited
US2052014A
Cited
US2338691A
Cited
FR865725A
Cited
US2460482A
Cited
US2460499A
Cited
US2544474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |