US3426043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-guanidinylmethyl-2,3-dihydrobenzofurans
Assignee: Ward Blenkinsop and Co Ltd
•
Filing: 1966-11-28
•
Granted: 1969-02-04
•
Expires: 1986-11-28
Abstract
No abstract record available.
Inventors
- 👤 Peter N Green
- 👤 Maurice Shapero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:11
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79; C07D307/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A 2-GUANIDINYLMETHYL 2,3-DIHYDROBENZOFURAN HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A 2-GUANIDINYLMETHYL 2,3-DIHYDROBENZOFURAN HAVING THE FORMULA
References Cited (Backward Citations)
US3153057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |