US2631918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color forming chemical reaction recorder
Assignee: General Electric Co
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Filing: 1951-06-14
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Granted: 1953-03-17
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Expires: 1971-06-14
Abstract
No abstract record available.
Inventors
- 👤 Walter F Kozak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:07
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
RECORDING APPARATUS COMPRISING A LIGHTCOLORED, DRY PAPER CHART HAVING A RECORDING SURFACE TREATED WITH PHENOLPHTHALEIN AND A STYLUS IN CONTACT WITH, AND MOVABLE RELATIVE TO, THE TREATED SURFACE OF SAID CHART, SAID STYLUS CARRYING A SODIUM ALLOY IN CONTACT WITH SAID TREATED SURFACE AND PRODUCING A CHEMICAL REACTION WITH THE PHENOLPHTHALEIN WITHOUT THE AID OF ELECTRICTY, SAID CHEMICAL REACTION CHANGING THE COLOR OF THE PHENOLPHTHALEIN TO LEAVE A RECORD ON THE CHART OF THE MOVEMENT OF THE STYLUS RELATIVE THERETO.
Claim 2
Dependent Claim
80 words
RECORDING APPARATUS COMPRISING A LIGHTCOLORED, DRY PAPER CHART HAVING A RECORDING SURFACE TREATED WITH PHENOLPHTHALEIN AND A STYLUS IN CONTACT WITH, AND MOVABLE RELATIVE TO, THE TREATED SURFACE OF SAID CHART, SAID STYLUS CARRYING A SODIUM ALLOY IN CONTACT WITH SAID TREATED SURFACE AND PRODUCING A CHEMICAL REACTION WITH THE PHENOLPHTHALEIN WITHOUT THE AID OF ELECTRICTY, SAID CHEMICAL REACTION CHANGING THE COLOR OF THE PHENOLPHTHALEIN TO LEAVE A RECORD ON THE CHART OF THE MOVEMENT OF THE STYLUS RELATIVE THERETO.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |