US2991632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system
Assignee: Individual
•
Filing: 1958-12-11
•
Granted: 1961-07-11
•
Expires: 1978-12-11
Abstract
No abstract record available.
Inventors
- 👤 John G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:24
CPC Classifications
F; F25; F25B; F25B27/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1091957A
Cited
US1871244A
Cited
US2272925A
Cited
US2411347A
Cited
US2421387A
Cited
US2511716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |