US2867237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve constructions
Assignee: Carrier Corp
•
Filing: 1956-02-20
•
Granted: 1959-01-06
•
Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 Walter F Allingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:00
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/048; F16K11/044; F25; F25B; F25B41/00; F25B41/20; F25B41/26; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86726; Y10T137/86839
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2066161A
Cited
US2596036A
Cited
US2654227A
Cited
US2703106A
Cited
US2723537A
Cited
US2745254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |