US2939867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of alkylene dihalides and substituted phenylenediamines
Assignee: Bridgestone Firestone Inc
•
Filing: 1954-10-15
•
Granted: 1960-06-07
•
Expires: 1974-10-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Ambelang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US1673801A
Cited
US2128945A
Cited
US1965463A
Cited
US1906939A
Cited
US2261002A
Cited
US2661291A
Cited
US2697728A
Cited
US2691677A
Cited
US2705224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |