US2823933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating system and method of making the same
Assignee: Individual
•
Filing: 1954-09-21
•
Granted: 1958-02-18
•
Expires: 1974-09-21
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hickman
- 👤 Allen L Goldsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:46
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/007; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12493; Y10T428/12736; Y10T428/12743
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1758638A
Cited
US1930191A
Cited
US2513365A
Cited
US2612682A
Cited
US2769231A
Cited
US2769318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |