Patent US3143575A successfully refreshed from Google Patents.
US3143575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlokination of bisphenols
Assignee: —
•
Filing: —
•
Granted: 1964-08-04
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Expires: 1981-08-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:11
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
IN A PROCESS FOR CHLORINATING A DIPHENOL HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
11 words
IN A PROCESS FOR CHLORINATING A DIPHENOL HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2542972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |