Patent US4383299A successfully refreshed from Google Patents.
Patent US3055931A successfully refreshed from Google Patents.
US3055931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatically unsaturated organic compounds and preparation thereof
Assignee: 3M Co
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Filing: 1956-04-19
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Granted: 1962-09-25
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Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Horace R Davis
- 👤 Louis A Errede
- 👤 Billy F Landrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:11
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C201/00; C07C201/06; C07C201/12; C07C327/00; C07C327/20; C07C327/26; C07C327/36; C07C67/00; C07C67/04; C08; C08G; C08G61/00; C08G61/02; C08G61/025; C08G2261/00; C08G2261/30; C08G2261/34; C08G2261/342; C08G2261/3424
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
THE PROCESS WHICH COMPRISES REACTING AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF A CARBOXYLIC ACID, A THIOCARBOXYLIC ACID AND A CARBODITHIOIC ACID WITH A PARA QUINODIMETHANE IN THE LIQUID PHASE AT A TEMPERATURE BELOW 30* C.
Claim 2
Dependent Claim
38 words
THE PROCESS WHICH COMPRISES REACTING AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF A CARBOXYLIC ACID, A THIOCARBOXYLIC ACID AND A CARBODITHIOIC ACID WITH A PARA QUINODIMETHANE IN THE LIQUID PHASE AT A TEMPERATURE BELOW 30* C.
References Cited (Backward Citations)
US2378447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |