US2663791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing implement flashlight attachment
Assignee: Individual
•
Filing: 1951-05-31
•
Granted: 1953-12-22
•
Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Carl R Hettrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:20
CPC Classifications
B; B43; B43K; B43K29/00; B43K29/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR978634A
Cited
GB340957A
Cited
US1937104A
Cited
FR799702A
Cited
US2231410A
Cited
US2261320A
Cited
US2407106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |