US3087309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for refrigeration
Assignee: Commonwealth Engineering Company of Ohio
•
Filing: 1960-12-22
•
Granted: 1963-04-30
•
Expires: 1980-12-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:33
CPC Classifications
F; F25; F25B; F25B27/00; F25B27/002; F24; F24F; F24F5/00; F24F5/0042; F24F5/0046; F25B21/00; F25B21/02; H; H10; H10N; H10N10/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |