US3539803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyroelectric detector assembly
Assignee: Barnes Engineering Co
•
Filing: 1967-12-21
•
Granted: 1970-11-10
•
Expires: 1987-12-21
Abstract
No abstract record available.
Inventors
- 👤 Henry P Beerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:28
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
SU147815A1
Cited
US3300585A
Cited
US3294988A
Cited
US3351786A
Cited
US3398281A
Cited
US3433953A
Cited
US3453887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |