US2977838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Square-recessed screws and punch means for making same
Assignee: General American Transportation Corp
•
Filing: 1957-09-20
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Granted: 1961-04-04
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Expires: 1977-09-20
Abstract
No abstract record available.
Inventors
- 👤 Oestereicher Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:31
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/44; B21K1/46; B21K1/463; F; F16; F16B; F16B23/00; F16B23/0007; F16B23/0038; Y; Y10; Y10S; Y10S411/00; Y10S411/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190809980A
Cited
US1003657A
Cited
US1771610A
Cited
US1978371A
Cited
US2206085A
Cited
US2216382A
Cited
US2397216A
Cited
US2673359A
Cited
US2804894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |