US3240693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hygrometer
Assignee: Beckman Coulter Inc
•
Filing: 1961-08-28
•
Granted: 1966-03-15
•
Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Douglas B Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:21
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/423
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS OF MAKING AN ELECTROLYTIC HYGROMETER CELL COMPRISING THE STEPS OF: SPACE WINDING A SINGLE PAIR OF ELECTTRICAL CONDUCTORS ON A MANDREL SO THAT SAID CONDUCTORS ARE SUBSTANTIALLY EQUALLY SPACED FROM EACH OTHER WHILE EXERTING SUFFICIENT TENSION ON SAID CONDUCTORS TOCAUSE THEM TO PARTIALLY FLATTEN AGAINST SAID MANDREL; DISPOSING A JACKET OF A THERMOPLASTIC RESIN AROUND SAID WINDING AND SAID MANDREL; APPLYING PRESSURE TO THE EXTERNAL SURFACE OF SAID JACKET TO SUBSTANTIALLY COMPLETELY FILL THE SPACE BETWEEN SAID CONDUCTORS WITH SAID RESIN; REMOVING SAID MANDREL FROM SAID JACKET WHEREBY AN ANNULAR PASSAGEWAY IS FORMED IN SAID JACKET; AND COATING A THIN FILM OF A HYGROSCOPIC SUBSTANCE ON THE SURFACE OF SAID ANNULAR PASSAGEWAY OVER THE ENTIRE LENGTH OF SAID WINDING.
Claim 2
Dependent Claim
121 words
A PROCESS OF MAKING AN ELECTROLYTIC HYGROMETER CELL COMPRISING THE STEPS OF: SPACE WINDING A SINGLE PAIR OF ELECTTRICAL CONDUCTORS ON A MANDREL SO THAT SAID CONDUCTORS ARE SUBSTANTIALLY EQUALLY SPACED FROM EACH OTHER WHILE EXERTING SUFFICIENT TENSION ON SAID CONDUCTORS TOCAUSE THEM TO PARTIALLY FLATTEN AGAINST SAID MANDREL; DISPOSING A JACKET OF A THERMOPLASTIC RESIN AROUND SAID WINDING AND SAID MANDREL; APPLYING PRESSURE TO THE EXTERNAL SURFACE OF SAID JACKET TO SUBSTANTIALLY COMPLETELY FILL THE SPACE BETWEEN SAID CONDUCTORS WITH SAID RESIN; REMOVING SAID MANDREL FROM SAID JACKET WHEREBY AN ANNULAR PASSAGEWAY IS FORMED IN SAID JACKET; AND COATING A THIN FILM OF A HYGROSCOPIC SUBSTANCE ON THE SURFACE OF SAID ANNULAR PASSAGEWAY OVER THE ENTIRE LENGTH OF SAID WINDING.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |