Patent US3786932A successfully refreshed from Google Patents.
US3786932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core trays
Assignee: Schlegel Co Canada Ltd
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Filing: 1971-10-08
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Granted: 1974-01-22
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Expires: 1991-10-08
Abstract
Abstract The invention relates to a plastic drill core tray of the type having a plurality of longitudinally extending channels disposed in a side by side relationship which are dished in cross-section to contain a drill core. The effective contained angle of the cross-section at the dished bottom of the channels is greater than 90*. The plastic tray is reinforced with elongated metal reinforcing ribs having a U-shaped cross-section. The ribs are adhered to adjacent longitudinally extending marginal areas of adjacent channels to provide longitudinally extending reinforcing means, and the contained angle of the cross-section of the tray at the adjacent longitudinally extending areas is less than 90*.
Inventors
- 👤 C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:54
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/34; B65D1/36; E; E21; E21B; E21B25/00; E21B25/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A tray comprising a plastic bottom formed with a plurality of parallel longitudinally extending channels, each having a dished cross-section with side walls that make a contained angle at the bottom of more than 90* and each merging with an adjacent channel at a longitudinal edge, and elongated metal reinforcing ribs each having a U cross-section, the arms of the U being adhered to adjacent longitudinally extending marginal areas of adjacent channels, the contained angle of the cross-section of said tray at said adjacent longitudinally extending areas being less than 90*, and transverse reinforcing ribs adhered to and complementary to the cross-sectional shape of the said bottom.
Claim 2
Dependent Claim
107 words
A tray comprising a plastic bottom formed with a plurality of parallel longitudinally extending channels, each having a dished cross-section with side walls that make a contained angle at the bottom of more than 90* and each merging with an adjacent channel at a longitudinal edge, and elongated metal reinforcing ribs each having a U cross-section, the arms of the U being adhered to adjacent longitudinally extending marginal areas of adjacent channels, the contained angle of the cross-section of said tray at said adjacent longitudinally extending areas being less than 90*, and transverse reinforcing ribs adhered to and complementary to the cross-sectional shape of the said bottom.
Claim 3
Dependent Claim
126 words
A traY comprising, a plastic bottom formed with a plurality of parallel longitudinally extending channels, each having a dished cross-section with side walls that make a contained angle at the bottom of more than 90* and each merging with an adjacent channel at a longitudinal edge, and elongated metal reinforcing ribs each having a U cross-section, the arms of the U being adhered to adjacent longitudinally extending marginal areas of adjacent channels, the contained angle of the cross-section of said tray at said adjacent longitudinally extending areas being less than 90*, said contained angle of a cross-section of said tray at the longitudinally extending areas being 45*, plus or minus 10*, and transverse reinforcing ribs adhered to and complementary to the cross-sectional shape of said bottom.
Claim 4
Dependent Claim
126 words
A traY comprising, a plastic bottom formed with a plurality of parallel longitudinally extending channels, each having a dished cross-section with side walls that make a contained angle at the bottom of more than 90* and each merging with an adjacent channel at a longitudinal edge, and elongated metal reinforcing ribs each having a U cross-section, the arms of the U being adhered to adjacent longitudinally extending marginal areas of adjacent channels, the contained angle of the cross-section of said tray at said adjacent longitudinally extending areas being less than 90*, said contained angle of a cross-section of said tray at the longitudinally extending areas being 45*, plus or minus 10*, and transverse reinforcing ribs adhered to and complementary to the cross-sectional shape of said bottom.
References Cited (Backward Citations)
CA531345A
Cited
US948521A
Cited
US1227444A
Cited
US1590144A
Cited
US2652702A
Cited
FR1060599A
Cited
US2927711A
Cited
US2896809A
Cited
US3476259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |