US3099108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor for securing electrical fixtures and the like to concrete walls
Assignee: Individual
•
Filing: 1959-04-29
•
Granted: 1963-07-30
•
Expires: 1979-04-29
Abstract
No abstract record available.
Inventors
- 👤 William F Kalkbrenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:11
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/41; E04B1/4171; Y; Y10; Y10S; Y10S411/00; Y10S411/922; Y10S411/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172553A
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US1463863A
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US1573151A
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US1718438A
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US1701095A
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FR682969A
Cited
GB455280A
Cited
US2218099A
Cited
US2370174A
Cited
US2412307A
Cited
US2874603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |