Patent US2987855A successfully refreshed from Google Patents.
US2987855A
Expired / Lapsed
US
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Composite tall-beam
Assignee: Gregory Industries Inc
•
Filing: 1958-07-18
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Granted: 1961-06-13
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Expires: 1978-07-18
Abstract
No abstract record available.
Inventors
- 👤 Robert C Singleton
- 👤 Richard E Mcginnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:16
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/293; E04C3/294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22411E
Cited
US1662896A
Cited
US1922340A
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US2016616A
Cited
US2319049A
Cited
US2340176A
Cited
US2562601A
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 |