US2851042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling equipment
Assignee: British Thomson Houston Co Ltd
•
Filing: 1956-09-24
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Granted: 1958-09-09
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Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Spence William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:02
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/573; B; B21; B21B; B21B37/00; B21B37/74; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4517
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |