US2564310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for controlling the head pressure in refrigerating systems
Assignee: Kramer Trenton Co
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Filing: 1950-10-05
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Granted: 1951-08-14
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Expires: 1970-10-05
Abstract
No abstract record available.
Inventors
- 👤 Otto J Nussbaum
- 👤 Frank C Obert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:17
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; Y; Y10; Y10S; Y10S62/00; Y10S62/17
Claims Analysis
Total Claims: 0
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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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |