Patent US2831896A successfully refreshed from Google Patents.
US2831896A
Expired / Lapsed
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Compositions of polythiols and method of making the same
Assignee: Dow Chemical Co
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Filing: 1956-04-04
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Granted: 1958-04-22
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Expires: 1976-04-04
Abstract
No abstract record available.
Inventors
- 👤 Earl D Holly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:31
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/12; C07; C07C; C07C323/00; C08G75/02; C08G75/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD OF MAKING A PLYTHIOL COMPOSITION COMPRISING ESENTIALLY A MIXTURE OF A MAJOR AMOUNT OF A DITHIOL AND A MINOR AMOUNT OF A POLYTHIOL CONTAINING AT LERAST THREE THIOL GROUPS IN THE MOLECULE, WHICH METHOD COMPRISES (1) REACTING A DITHIOL SELECTED FROM THE GROUP CONSITING OF (A) DITHIOLS OF THE FORMULA:
Claim 2
Independent Claim
52 words
A METHOD OF MAKING A PLYTHIOL COMPOSITION COMPRISING ESENTIALLY A MIXTURE OF A MAJOR AMOUNT OF A DITHIOL AND A MINOR AMOUNT OF A POLYTHIOL CONTAINING AT LERAST THREE THIOL GROUPS IN THE MOLECULE, WHICH METHOD COMPRISES (1) REACTING A DITHIOL SELECTED FROM THE GROUP CONSITING OF (A) DITHIOLS OF THE FORMULA:
References Cited (Backward Citations)
US2230966A
Cited
US2402665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |