Patent US3538324A successfully refreshed from Google Patents.
US3538324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable beam spotlamp
Assignee: Mole Richardson Co
•
Filing: 1966-09-29
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Granted: 1970-11-03
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Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 Maxey A Hankins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:49
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/02; F21V21/00; F21V21/14; F21V21/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1292616A
Cited
US1440552A
Cited
US1615552A
Cited
US2065735A
Cited
GB425633A
Cited
US2280406A
Cited
US3254205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |