US2611216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and machine for making circular fluorescent lamps
Assignee: CONS ELECTRIC LAMP Co
•
Filing: 1949-03-25
•
Granted: 1952-09-23
•
Expires: 1969-03-25
Abstract
No abstract record available.
Inventors
- 👤 Howard C Snow
- 👤 Everett F Kelley
- 👤 Samuel S Sayward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:14
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/06; C03B23/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US670167A
Cited
US1482455A
Cited
US2208958A
Cited
US2270152A
Cited
US2258408A
Cited
US2494872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |