US3354828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency light unit
Assignee: Individual
•
Filing: 1965-09-23
•
Granted: 1967-11-28
•
Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 Shefler Sydney
- 👤 Steven M Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:03
CPC Classifications
F; F21; F21K; F21K2/00; F21K2/06; C; C09; C09K; C09K11/00; C09K11/06; C09K11/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
AN EMERGENCY LIGHT UNIT COMPRISING AN HERMETICALLY SEALED LIGHT TRANSMITTING TUBE PROVIDED WITH FRANGIBLE BREAK TIPS ON EACH END; A CYLINDRICAL WICK SATURATED WITH AN OXYLUMINESCENT COMPOSITION SUBSTANTIALLY FILLING THE TUBE; AND A FILTER WHICH PASSES ONLY AIR FIRMLY SEATED IN EACH OF SAID TUBE ADJACENT THE ENDS OF SAID WICK; WHEREBY RUPTURE OF SAID TIPS PERMITS AIR TO ENTER THROUGH THE FILTERS TO ACTIVATE THE WICK.
Claim 2
Dependent Claim
67 words
AN EMERGENCY LIGHT UNIT COMPRISING AN HERMETICALLY SEALED LIGHT TRANSMITTING TUBE PROVIDED WITH FRANGIBLE BREAK TIPS ON EACH END; A CYLINDRICAL WICK SATURATED WITH AN OXYLUMINESCENT COMPOSITION SUBSTANTIALLY FILLING THE TUBE; AND A FILTER WHICH PASSES ONLY AIR FIRMLY SEATED IN EACH OF SAID TUBE ADJACENT THE ENDS OF SAID WICK; WHEREBY RUPTURE OF SAID TIPS PERMITS AIR TO ENTER THROUGH THE FILTERS TO ACTIVATE THE WICK.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |