US3345537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric shield including a dielectric sheet sandwiched between two metal sheets
Assignee: Melpar Inc
•
Filing: 1965-02-12
•
Granted: 1967-10-03
•
Expires: 1985-02-12
Abstract
No abstract record available.
Inventors
- 👤 Sr James C Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:55
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A SHIELD FOR ENCIRCLING THE LONGITUDINAL SURFACE OF A PHOTOMULTIPLIER TUBE HAVING A PHOTOCATHODE DISPOSED AT ONE END THEREOF OF RECEIVE LIGHT ENERGY, SAID SHIELD COMPRISING A PAIR OF METAL SHEETS HAVING SANDWICHED BETWEEN THEM A LAYER OF DI-ELECTRIC MATERIAL, AND MEANS FOR ELECTRICALLY CONNECTING SAID TWO METAL SHEETS TOGETHER AND TO SAID PHOTOCATHODE.
Claim 2
Dependent Claim
54 words
A SHIELD FOR ENCIRCLING THE LONGITUDINAL SURFACE OF A PHOTOMULTIPLIER TUBE HAVING A PHOTOCATHODE DISPOSED AT ONE END THEREOF OF RECEIVE LIGHT ENERGY, SAID SHIELD COMPRISING A PAIR OF METAL SHEETS HAVING SANDWICHED BETWEEN THEM A LAYER OF DI-ELECTRIC MATERIAL, AND MEANS FOR ELECTRICALLY CONNECTING SAID TWO METAL SHEETS TOGETHER AND TO SAID PHOTOCATHODE.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |