US2877210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 2'-methylenebis
Assignee: Hercules Powder Co
•
Filing: 1957-07-03
•
Granted: 1959-03-10
•
Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Bankert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:49
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C07; C07C; C07C37/00; C07C37/11; C07C37/20; C07C39/00; C07C39/12; C07C39/15; C07C39/16; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
RUBBER STABILIZED AGAINST OXIDATIVE DETERIORATION BY THE PRESENCE OF A MINOR AMOUNT OF A COMPOSITING PREPARED BY REACTING M-ISOPROPYLPHENOL WITH FORMULDEHYDE IN MOLAR PROPORTION OF 2:1 IN THE PRESENCE OF AN ACID CATALYST AND COMPRISING A COMPOUND HAVING THE PROBABLE STRUCTURE:
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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |