US2635856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masonry drill
Assignee: Diamond Expansion Bolt Co Inc
•
Filing: 1949-05-27
•
Granted: 1953-04-21
•
Expires: 1969-05-27
Abstract
No abstract record available.
Inventors
- 👤 Harvey D G Scheffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:48
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58; B; B28; B28D; B28D1/00; B28D1/14; B28D1/146; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12208; Y10T428/12333; Y10T428/12486
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US994668A
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US1135530A
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US1106966A
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US1388792A
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DE363913C
Cited
DE584050C
Cited
GB375596A
Cited
GB423647A
Cited
US2101376A
Cited
GB500147A
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US2507221A
Cited
US2506474A
Cited
US2585333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |