Patent US2512038A successfully refreshed from Google Patents.
US3349408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recorder
Assignee: Leeds and Northrup Co
•
Filing: 1965-08-12
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Granted: 1967-10-24
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Expires: 1985-08-12
Abstract
No abstract record available.
Inventors
- 👤 Raymond D Gillen
- 👤 William T Knipe
- 👤 Mcadam Will
- 👤 Norman E Polster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:56
CPC Classifications
B; B41; B41M; B41M5/00; B41M3/00; B41M3/001; B41M5/50; B41M5/52; G; G01; G01D; G01D15/00; G01D15/06; B41M5/5218; B41M5/5227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN A RECORDER, THE COMBINATION WITH A CHART ON WHICH THERE ARE TO BE RECORDED MAGNITUDES OF A CONDITION, OF A PEN ADAPTED TO ENGAGE SAID CHART TO RECORD SAID MAGNITUDES OF A CONDITION, SAID PEN CONSISTING OF A CAPILLARY TUBE, AND MEANS FOR PROVIDING RELATIVE MOTION BETWEEN SAID PEN AND SAID CHART, SAID CHART COATED AT LEAST IN LIMITED AREAS THEREOF WITH A FIRST COMPONENT OF A TWO COMPONENT MARKING SYSTEM FOR THE CHEMICAL PRODUCTION OF A VISIBLE MARKING ON SAID CHART UPON THE APPLICATION THERETO OF THE SECOND COMPONENT OF SAID MARKING SYSTEM, SAID FIRST AND SECOND COMPONENTS BEING INDEPENDENTLY SELECTED FROM THE CLASS CONSISTING OF (A) A SALT OF A TRANSITION METAL AND (B) AN ORGANIC COMPOUND CAPABLE OF REACTING WITH SAID SALT TO PROVIDE SAID VISIBLE MARKING ON SAID CHART, WITH THE PROVISION THAT WHEN THE FIRST COMPONENT IS SELECTED FROM (A) THE SECOND COMPONENT MUST BE SELECTED FROM (B) AND VICE VERSA.
Claim 2
Dependent Claim
157 words
IN A RECORDER, THE COMBINATION WITH A CHART ON WHICH THERE ARE TO BE RECORDED MAGNITUDES OF A CONDITION, OF A PEN ADAPTED TO ENGAGE SAID CHART TO RECORD SAID MAGNITUDES OF A CONDITION, SAID PEN CONSISTING OF A CAPILLARY TUBE, AND MEANS FOR PROVIDING RELATIVE MOTION BETWEEN SAID PEN AND SAID CHART, SAID CHART COATED AT LEAST IN LIMITED AREAS THEREOF WITH A FIRST COMPONENT OF A TWO COMPONENT MARKING SYSTEM FOR THE CHEMICAL PRODUCTION OF A VISIBLE MARKING ON SAID CHART UPON THE APPLICATION THERETO OF THE SECOND COMPONENT OF SAID MARKING SYSTEM, SAID FIRST AND SECOND COMPONENTS BEING INDEPENDENTLY SELECTED FROM THE CLASS CONSISTING OF (A) A SALT OF A TRANSITION METAL AND (B) AN ORGANIC COMPOUND CAPABLE OF REACTING WITH SAID SALT TO PROVIDE SAID VISIBLE MARKING ON SAID CHART, WITH THE PROVISION THAT WHEN THE FIRST COMPONENT IS SELECTED FROM (A) THE SECOND COMPONENT MUST BE SELECTED FROM (B) AND VICE VERSA.
References Cited (Backward Citations)
US178165A
Cited
US926869A
Cited
US1405409A
Cited
US2631918A
Cited
US3063050A
Cited
US3278327A
Cited
FR1243524A
Cited
US3101283A
Cited
US3054109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |