US2671950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing thermopiles
Assignee: Individual
•
Filing: 1951-03-15
•
Granted: 1954-03-16
•
Expires: 1971-03-15
Abstract
No abstract record available.
Inventors
- 👤 Sukacev Lev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:59
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/01; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/931; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12333; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291; Y10T428/249921; Y10T428/249922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189924968A
Cited
US1441569A
Cited
US1748822A
Cited
US1767715A
Cited
US1809089A
Cited
US1994767A
Cited
US2557571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |