US3521480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash point testing device including cooling means for the flash chamber
Assignee: Precision Scientific Co
•
Filing: 1967-06-14
•
Granted: 1970-07-21
•
Expires: 1987-06-14
Abstract
No abstract record available.
Inventors
- 👤 Walter V Cropper
- 👤 Paul R Carlstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:04
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/50; G01N25/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2634360A
Cited
US2746285A
Cited
US2939312A
Cited
US3011337A
Cited
US3060299A
Cited
US3368388A
Cited
US3402595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |