Patent US2328830A successfully refreshed from Google Patents.
Patent US2992240A successfully refreshed from Google Patents.
US2992240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1958-09-22
•
Granted: 1961-07-11
•
Expires: 1978-09-22
Abstract
No abstract record available.
Inventors
- 👤 Lodge Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:45
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/54; C09B1/545; C09B1/16; C09B1/20; C09B1/56; C09B1/58; C09B1/60; C09B62/00; C09B62/44; C09B62/78; C09B62/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
DYESTUFFS OF THE FORMULA:
Claim 2
Dependent Claim
4 words
DYESTUFFS OF THE FORMULA:
References Cited (Backward Citations)
US1881752A
Cited
GB361338A
Cited
US2441355A
Cited
US2640062A
Cited
US2640061A
Cited
US2537975A
Cited
US2568579A
Cited
US2768052A
Cited
US2870172A
Cited
US2844598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |