US3463869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerated underground transmission line and process
Assignee: Air Products and Chemicals Inc
•
Filing: 1966-07-13
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Granted: 1969-08-26
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Expires: 1986-07-13
Abstract
No abstract record available.
Inventors
- 👤 Gerald J Cooley
- 👤 Thomas E Cormier
- 👤 Peter A Sipple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:15
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/02; H03G5/04; H03G5/10; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H02; H02J; H02J3/00; H02G; H02G9/00; H02G9/02; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/885
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) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |