US2983117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption refrigerating system
Assignee: Trane Co
•
Filing: 1958-07-30
•
Granted: 1961-05-09
•
Expires: 1978-07-30
Abstract
No abstract record available.
Inventors
- 👤 Edberg Per
- 👤 Edward M Stubblefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:16
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2196911A
Cited
US2317517A
Cited
US2400192A
Cited
US2430047A
Cited
US2473389A
Cited
US2915886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |