US3414052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular heat exchangers
Assignee: Central Electricity Generating Board
•
Filing: 1966-10-18
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Granted: 1968-12-03
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Expires: 1986-10-18
Abstract
No abstract record available.
Inventors
- 👤 Chojnowski Boguslaw
- 👤 Beckerleg Bruce Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:09
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/04; C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/384; F28D; F28D7/00; F28D7/0008; F28F9/00; F28F9/007; F28F9/013; F28F9/02; F28F9/04; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/429; Y10S165/43
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |