US3223273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced envelope for light source and method of making
Assignee: Duro Test Corp
•
Filing: 1962-09-07
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Granted: 1965-12-14
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Expires: 1982-09-07
Abstract
No abstract record available.
Inventors
- 👤 Thorington Luke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:13
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AN ELECTRIC LIGHT SOURCE INCLUDING AN EVACUATED GLASS ENVELOPE, A CONTINUOUS SURFACE COVERING OF LIGHT TRANSMITTING YARN ON SAID ENVELOPE, AND AN ADHESIVE RESIN HAVING SUBSTANTIALLY THE SAME INDEX OF REFRACTION AS SAID ENVELOPE AND FORMING RESIN-TO-GLASS BOND BETWEEN SAID YARN AND ENVELOPE.
Claim 2
Dependent Claim
43 words
AN ELECTRIC LIGHT SOURCE INCLUDING AN EVACUATED GLASS ENVELOPE, A CONTINUOUS SURFACE COVERING OF LIGHT TRANSMITTING YARN ON SAID ENVELOPE, AND AN ADHESIVE RESIN HAVING SUBSTANTIALLY THE SAME INDEX OF REFRACTION AS SAID ENVELOPE AND FORMING RESIN-TO-GLASS BOND BETWEEN SAID YARN AND ENVELOPE.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |