US2829505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Systems for preventing ice formation
Assignee: Lockheed Martin Corp
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Filing: 1955-04-27
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Granted: 1958-04-08
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Expires: 1975-04-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Clifford Oates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:28
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; F; F25; F25D; F25D21/00; F25D21/02; F25D21/025; F25D21/04; Y; Y10; Y10T; Y10T137/00; Y10T137/1189; Y10T137/2496; Y10T137/2514; Y10T137/2521
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |