US2991189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating a substrate with coal acids and article produced thereby
Assignee: Dow Chemical Co
•
Filing: 1957-01-11
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Granted: 1961-07-04
•
Expires: 1977-01-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Rickert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:16
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/12; C; C03; C03C; C03C17/00; C03C17/28; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/12; C23F11/124; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31855; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR MAKING A COATED SUBSTRATE HAVING A WATER REMOVABLE PROTECTIVE FILM WHICH COMPRISES DEPOSITING UPON A SUBSTRATE A CONTINUOUS FILM OF COAL ACIDS, SAID COAL ACIDS BEING THE WATER-SOLUBLE, MIXED AROMATIC CARBOXYLIC ACIDS THAT ARE THE PRODUCTS OF THE OXIDATION OF CARBONACEOUS MATERIALS, WHICH ACIDS TYPICALLY HAVE AN AVERAGE MOLECULAR WEIGHT OF ABOUT 250, AN AVERAGE EQUIVALENT WEIGHT OF ABOUT 80 AND CONTAIN AN AVERAGE OF FROM ABOUT 2.5 TO 5 CARBOXYLIC GROUPS PER AROMATIC NUCLEUS IN THEIR MOLECULES.
Claim 2
Dependent Claim
81 words
A PROCESS FOR MAKING A COATED SUBSTRATE HAVING A WATER REMOVABLE PROTECTIVE FILM WHICH COMPRISES DEPOSITING UPON A SUBSTRATE A CONTINUOUS FILM OF COAL ACIDS, SAID COAL ACIDS BEING THE WATER-SOLUBLE, MIXED AROMATIC CARBOXYLIC ACIDS THAT ARE THE PRODUCTS OF THE OXIDATION OF CARBONACEOUS MATERIALS, WHICH ACIDS TYPICALLY HAVE AN AVERAGE MOLECULAR WEIGHT OF ABOUT 250, AN AVERAGE EQUIVALENT WEIGHT OF ABOUT 80 AND CONTAIN AN AVERAGE OF FROM ABOUT 2.5 TO 5 CARBOXYLIC GROUPS PER AROMATIC NUCLEUS IN THEIR MOLECULES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |