US2503196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-phenols
Assignee: Dow Chemical Co
•
Filing: 1949-03-30
•
Granted: 1950-04-04
•
Expires: 1969-03-30
Abstract
No abstract record available.
Inventors
- 👤 Andrew J Dietzler
- 👤 Bryner Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:28
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/12; C07C39/17; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A BIS-PHENOL COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A BIS-PHENOL COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |