US3401263A
Expired / Lapsed
US
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Apparatus and method of measuring emissivity of an object
Assignee: RICHARD C BIRKEBAK
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Filing: 1965-04-15
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Granted: 1968-09-10
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Expires: 1985-04-15
Abstract
No abstract record available.
Inventors
- 👤 Richard C Birkebak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/52; G01J5/53; G01J5/0003; G01J5/02; G01J5/06; G01J5/061; G01J5/80; G01J5/802; G01J1/00; G01J1/02; G01J1/04; G01J2001/0481; G01J2005/0074
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |