US2881090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnation of carbonaceous materials
Assignee: Union Carbide Corp
•
Filing: 1957-03-13
•
Granted: 1959-04-07
•
Expires: 1977-03-13
Abstract
No abstract record available.
Inventors
- 👤 Ronald W Reidl
- 👤 Michael A Bobal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:50
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/4853; C04B41/80; C04B41/81; C04B41/82; C04B41/83; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A BAKED CARBON ARTICLE WHICH IN ITS NORMAL USE IS EXPOSED TO CORROSIVE CONDITIONS AT ELEVATED TEMPERATURES, THE PORES OF WHICH ARE SUBSTANTIALLY FILLED WITH A RESINIFIED MIXTURE OF A THERMOSETTING EPOXY RESIN, AND ORGANIC DILUENT HAVING FUNCTIONAL GROUPS CAPABLE OF REACTING WITH THE OXIRANE GROUPS OF SAID RESIN, AND A SOLUTION OF DICYANDIAMIDE IN DIMETHYL FORMAMIDE.
Claim 2
Dependent Claim
57 words
A BAKED CARBON ARTICLE WHICH IN ITS NORMAL USE IS EXPOSED TO CORROSIVE CONDITIONS AT ELEVATED TEMPERATURES, THE PORES OF WHICH ARE SUBSTANTIALLY FILLED WITH A RESINIFIED MIXTURE OF A THERMOSETTING EPOXY RESIN, AND ORGANIC DILUENT HAVING FUNCTIONAL GROUPS CAPABLE OF REACTING WITH THE OXIRANE GROUPS OF SAID RESIN, AND A SOLUTION OF DICYANDIAMIDE IN DIMETHYL FORMAMIDE.
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |