US3011853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for detecting and recording temperature differentials
Assignee: AT&T Inc
•
Filing: 1947-10-02
•
Granted: 1961-12-05
•
Expires: 1967-10-02
Abstract
No abstract record available.
Inventors
- 👤 Lester M Ilgenfritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/02; G01J5/025; G01J5/04; G01J5/047; G01J5/10; G01J5/20; G01J5/22; G01J5/24; G01J5/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2177061A
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FR813404A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |