US2677367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat storage unit
Assignee: Individual
•
Filing: 1951-04-25
•
Granted: 1954-05-04
•
Expires: 1971-04-25
Abstract
No abstract record available.
Inventors
- 👤 Telkes Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:08
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; F; F28; F28D; F28D20/00; F28D20/02; F28D2020/0004; F28D2020/0021; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A HEAT STORAGE UNIT CONSISTING OF A CLOSED CONTAINER HAVING THEREIN NA2HPO4, WATER AND CRYSTALLIZATION PROMOTER COMPRISING GLASS WITH UNEVEN SURFACE, THE NA2HPO4 TAKEN ON AN ANHYDROUS BASIS BEING, BY WEIGHT, BETWEEN APPROXIMATELY 35% AND 39.6% OF THE SUM OF THE NA2HPO4 AND WATER, AND A SUBSTANTIAL PORTION OF THE SURFACE OF THE GLASS BEING MAINTAINED IN CONTACT WITH THE UPPER PART OF THE NA2HPO4 AND WATER.
Claim 2
Dependent Claim
67 words
A HEAT STORAGE UNIT CONSISTING OF A CLOSED CONTAINER HAVING THEREIN NA2HPO4, WATER AND CRYSTALLIZATION PROMOTER COMPRISING GLASS WITH UNEVEN SURFACE, THE NA2HPO4 TAKEN ON AN ANHYDROUS BASIS BEING, BY WEIGHT, BETWEEN APPROXIMATELY 35% AND 39.6% OF THE SUM OF THE NA2HPO4 AND WATER, AND A SUBSTANTIAL PORTION OF THE SURFACE OF THE GLASS BEING MAINTAINED IN CONTACT WITH THE UPPER PART OF THE NA2HPO4 AND WATER.
References Cited (Backward Citations)
US708549A
Cited
US1203776A
Cited
US1385074A
Cited
US1433010A
Cited
US2220777A
Cited
US2289425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |