Patent US2586780A successfully refreshed from Google Patents.
US2586780A
Expired / Lapsed
US
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Treatment of montan wax
Assignee: Armstrong World Industries Inc
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Filing: 1949-08-18
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Granted: 1952-02-26
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Expires: 1969-08-18
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Breuer
- 👤 David T Zentmyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:06
CPC Classifications
C; C10; C10G; C10G73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS OF PRODUCING A HARD WAXY MATERIAL FROM BLEACHED MONTAN WAX CONPRISING ESTERIFYING A PORTION OF THE ACID CONTENT OF THE BLEACHED WAX USING DIHYDRIC ALCOHOL, AND THEREAFTER ESTERIFYING SUBSTANTIALLY ALL OF THE REMAINING FREE CARBOXYL GROUPS WITH A HIGHER POLYHYDRIC ALCOHOL.
Claim 2
Dependent Claim
43 words
A PROCESS OF PRODUCING A HARD WAXY MATERIAL FROM BLEACHED MONTAN WAX CONPRISING ESTERIFYING A PORTION OF THE ACID CONTENT OF THE BLEACHED WAX USING DIHYDRIC ALCOHOL, AND THEREAFTER ESTERIFYING SUBSTANTIALLY ALL OF THE REMAINING FREE CARBOXYL GROUPS WITH A HIGHER POLYHYDRIC ALCOHOL.
References Cited (Backward Citations)
US1834056A
Cited
US2025612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |