US3069293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of mineral surfaces against spalling
Assignee: Wyeth Holdings LLC
•
Filing: 1961-06-02
•
Granted: 1962-12-18
•
Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Booth Robert Ben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:29
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/02; C10L5/26; C10L5/32; C08; C08L; C08L67/00; C08L67/08; C09; C09D; C09D167/00; C09D167/08; E; E21; E21F; E21F17/00; E21F5/00; E21F5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE PROCESS OF PROTECTING THE SURFACE OF COAL FROM RUB-OFF AND SPALLING WHICH COMPRISES COATING THE SURFACE OF DISCRETE LUMPS OF COAL WITH AN EMULSION OF AN ALKYD RESIN IN WATER AT RATE OF FROM 1 TO 50 POUNDS OF RESIN SOLIDS PER TON OF COAL AND DRYING THE EMULSION, THUS CAUSING SAID EMULSION TO FORM A STABLE, ALKYD RESIN-CONTAINING, PROTECTIVE COATING ON THE INDIVIDUAL COAL PIECES.
Claim 2
Dependent Claim
67 words
THE PROCESS OF PROTECTING THE SURFACE OF COAL FROM RUB-OFF AND SPALLING WHICH COMPRISES COATING THE SURFACE OF DISCRETE LUMPS OF COAL WITH AN EMULSION OF AN ALKYD RESIN IN WATER AT RATE OF FROM 1 TO 50 POUNDS OF RESIN SOLIDS PER TON OF COAL AND DRYING THE EMULSION, THUS CAUSING SAID EMULSION TO FORM A STABLE, ALKYD RESIN-CONTAINING, PROTECTIVE COATING ON THE INDIVIDUAL COAL PIECES.
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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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |