US2894004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bisphenols
Assignee: Dow Chemical Co
•
Filing: 1956-08-13
•
Granted: 1959-07-07
•
Expires: 1976-08-13
Abstract
No abstract record available.
Inventors
- 👤 Andrew J Dietzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:59
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
5 words
A BISPHENOL HAVING THE STRUCTURE
Claim 2
Dependent Claim
5 words
A BISPHENOL HAVING THE STRUCTURE
References Cited (Backward Citations)
US1986423A
Cited
US2069560A
Cited
US2069573A
Cited
US2464207A
Cited
US2498656A
Cited
US2503196A
Cited
US2538725A
Cited
US2542688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |