US2806023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved indicator dyes
Assignee: Individual
•
Filing: 1957-03-01
•
Granted: 1957-09-10
•
Expires: 1977-03-01
Abstract
No abstract record available.
Inventors
- 👤 Wenker Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:56
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/12; C09B29/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
COMPOUNDS OF THE CLASS CONSISTING OF:
Claim 2
Dependent Claim
6 words
COMPOUNDS OF THE CLASS CONSISTING OF:
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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |