Patent US3715232A successfully refreshed from Google Patents.
US3715232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shatter-resistant incandescent lamp
Assignee: GTE Sylvania Inc
•
Filing: 1971-07-01
•
Granted: 1973-02-06
•
Expires: 1991-07-01
Abstract
Abstract An electric lamp having a glass envelope with a tacky, shatterresistant silicone rubber coating over the envelope and a coating over that of a hard, heat resistant silicone material to resist the accumulation of dust on the tacky coating.
Inventors
- 👤 J Robertson
- 👤 E Audesse
- 👤 A Tartakoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:31
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/28; H01K1/32; C; C03; C03C; C03C17/00; C03C17/34; C03C17/3405; H01J; H01J5/00; H01J5/02; H01J5/03; H01J61/00; H01J61/02; H01J61/30; H01J61/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
An incandescent electric lamp including an enclosing envelope, a first coating of clear tacky silicone rubber over said envelope to reduce shattering of the glass on impact, and a second clear coating of a hard, heat-resistant silicone over said first coating to reduce the adherence of dust.
Claim 2
Dependent Claim
47 words
An incandescent electric lamp including an enclosing envelope, a first coating of clear tacky silicone rubber over said envelope to reduce shattering of the glass on impact, and a second clear coating of a hard, heat-resistant silicone over said first coating to reduce the adherence of dust.
References Cited (Backward Citations)
US3018187A
Cited
US3102049A
Cited
US3117245A
Cited
US3156107A
Cited
US3420694A
Cited
US3629228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |