US2833736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous graphite-polyvinyl alcohol ink composition
Assignee: Western Union Telegraph Co
•
Filing: 1953-07-20
•
Granted: 1958-05-06
•
Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 Harry W Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:21
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A DRAWING INK COMPRISING GRAPHITE PARTICLES WITHIN THE SIZE RANGE OF 2 TO 5 MICRONS AS A BINDER THERETO A SOLUTION OF POLYVINYL ALCOHOL IN WATER, SAID INK HAVING THE FOLLOWING PROPORTIONS: 8 TO 12 GRAMS GRAPHITE, .2 TO .3 GRAM POLYVINYL ALCOHOL AND 160 TO 240 GRAMS WATER.
Claim 2
Dependent Claim
49 words
A DRAWING INK COMPRISING GRAPHITE PARTICLES WITHIN THE SIZE RANGE OF 2 TO 5 MICRONS AS A BINDER THERETO A SOLUTION OF POLYVINYL ALCOHOL IN WATER, SAID INK HAVING THE FOLLOWING PROPORTIONS: 8 TO 12 GRAMS GRAPHITE, .2 TO .3 GRAM POLYVINYL ALCOHOL AND 160 TO 240 GRAMS WATER.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |