Patent US2631168A successfully refreshed from Google Patents.
US2631168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyfunctional halogenated aromatic compounds and condensation products thereof
Assignee: Sprague Electric Co
•
Filing: 1948-02-07
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Granted: 1953-03-10
•
Expires: 1968-02-07
Abstract
No abstract record available.
Inventors
- 👤 Sidney D Ross
- 👤 Markarian Moushy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:26
CPC Classifications
C; C07; C07C; C07C57/00; C07C57/52; C07C57/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
BIS-HYDROXYMETHYL-TETRACHLOROBENZENE.
Claim 2
Dependent Claim
1 words
BIS-HYDROXYMETHYL-TETRACHLOROBENZENE.
References Cited (Backward Citations)
US1950468A
Cited
US2048774A
Cited
US2399716A
Cited
US2370394A
Cited
US2385789A
Cited
US2443887A
Cited
US2489363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |