Patent US3271613A successfully refreshed from Google Patents.
US3271613A
Expired / Lapsed
US
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Stress-relieved seal structure for arcuate fluorescent lamp or the like
Assignee: Philips North America LLC
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Filing: 1962-12-06
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Granted: 1966-09-06
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Expires: 1982-12-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Daniel M Spell
- 👤 Jack D Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:33
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54; H01J5/56; H01J5/565
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN AN ELECTRIC LAMP OR THE LIKE, A STRUCTURE COMPRISING; A VITREOUS ENVELOPE HAVING A CLOSED END PORTION, AND A CAP HAVING A METAL RIM PORTION THAT HAS A DIFFERENT COEFFICIENT OF EXPANSION THAN THE VITREOUS MATERIAL FROM WHICH THE ENVELOPE IS MADE AND IS JOINED DIRECTLY TO AND FORMS A SEAL WITH THE CLOSED END PORTION OF SAID ENVELOPE,
Claim 2
Dependent Claim
60 words
IN AN ELECTRIC LAMP OR THE LIKE, A STRUCTURE COMPRISING; A VITREOUS ENVELOPE HAVING A CLOSED END PORTION, AND A CAP HAVING A METAL RIM PORTION THAT HAS A DIFFERENT COEFFICIENT OF EXPANSION THAN THE VITREOUS MATERIAL FROM WHICH THE ENVELOPE IS MADE AND IS JOINED DIRECTLY TO AND FORMS A SEAL WITH THE CLOSED END PORTION OF SAID ENVELOPE,
References Cited (Backward Citations)
US728060A
Cited
US2056157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |