US2904765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast response recording hygrometer
Assignee: Individual
•
Filing: 1955-10-17
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Granted: 1959-09-15
•
Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Jerrold M Seehof
- 👤 Hans J Trurnit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A VAPOR PRESSURE SENSITIVE RESISTANCE ELEMENT COMPRISING A GLASS SURFACE COVERED WITH A THIN INVISIBLE LAYER OF VACUUM DEPOSITED CHROMIUM HAVING SPACED APART CONTACT TERMINALS FOR MAKING ELECTRICAL CONNECTIONS TO THE ELEMENT.
Claim 2
Dependent Claim
32 words
A VAPOR PRESSURE SENSITIVE RESISTANCE ELEMENT COMPRISING A GLASS SURFACE COVERED WITH A THIN INVISIBLE LAYER OF VACUUM DEPOSITED CHROMIUM HAVING SPACED APART CONTACT TERMINALS FOR MAKING ELECTRICAL CONNECTIONS TO THE ELEMENT.
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |