US2499360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxyalkylated diphenylolmethanes
Assignee: —
•
Filing: —
•
Granted: 1950-03-07
•
Expires: 1967-03-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:49
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/66; C07C69/73; C07C69/732; C07C69/52; C07C69/533; C07C69/58; C07C69/587; C07C69/67; C07C69/675; C07C69/68; C11; C11D; C11D1/00; C11D1/66; C11D1/722; C11D1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A SURFACE-ACTIVE OXYALKYLATED DERIVATIVE OF A DIPHENYLOLMETHANE HAVING THE FORMULA
Claim 2
Dependent Claim
10 words
A SURFACE-ACTIVE OXYALKYLATED DERIVATIVE OF A DIPHENYLOLMETHANE HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |