US3540914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive record sheets employing indole substituted pyromellitides
Assignee: Appvion LLC
•
Filing: 1969-01-24
•
Granted: 1970-11-17
•
Expires: 1989-01-24
Abstract
No abstract record available.
Inventors
- 👤 Chao-Han Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:06
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2505486A
Cited
US3244549A
Cited
US3268537A
Cited
US3336337A
Cited
US3455721A
Cited
US3491117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |