US3337578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 2'-alkylenebisbenzimidazoles
Assignee: Heidenheimer Chemisches Laboratorium
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Filing: 1961-09-15
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Granted: 1967-08-22
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Expires: 1981-09-15
Abstract
No abstract record available.
Inventors
- 👤 Bader Alfred
- 👤 Boyd E Graham
- 👤 Reif Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
C; C07; C07D; C07D243/00; C07D243/06; C07D243/10; C07D243/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (A) A 2,2''-ALKYLENEBISBENZIMIDAZOLE HAVING THE FORMULA:
Claim 2
Dependent Claim
14 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF (A) A 2,2''-ALKYLENEBISBENZIMIDAZOLE 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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |