Patent US2531373A successfully refreshed from Google Patents.
US2531373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of refrigeration
Assignee: 3M Co
•
Filing: 1949-02-28
•
Granted: 1950-11-21
•
Expires: 1969-02-28
Abstract
No abstract record available.
Inventors
- 👤 Waterman Beatrice Joy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:16
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE PROCESS OF TRANSFERRING HEAT COMPRISES CONDENSING TRIFLUOROBROMOMETHANE AND THEN EVAPORATING THE TRIFLUOROBROMOMETHANE IN THE VICINITY OF A BODY TO BE COOLED.
Claim 2
Dependent Claim
22 words
THE PROCESS OF TRANSFERRING HEAT COMPRISES CONDENSING TRIFLUOROBROMOMETHANE AND THEN EVAPORATING THE TRIFLUOROBROMOMETHANE IN THE VICINITY OF A BODY TO BE COOLED.
References Cited (Backward Citations)
USRE19265E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |