Patent US2987810A successfully refreshed from Google Patents.
US2987810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal working
Assignee: Olin Corp
•
Filing: 1956-01-23
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Granted: 1961-06-13
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Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Huntly M Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:11
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/155; B21C37/14; B21C37/151; B21D; B21D26/00; B21D26/02; B21D26/033; B21D26/053; B21D26/059; B21D53/00; B21D53/02; B21D53/04; B21D53/045; B22; B22D; B22D11/00; B23; B23P; B23P15/00; B23P15/04; B23P15/26; F; F28; F28F; F28F1/00; F28F1/02; F28F3/00; F28F3/12; F28F3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB304689A
Cited
DE932335C
Cited
US2498275A
Cited
US2582358A
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US2690002A
Cited
US2728317A
Cited
US2845695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |