US4155310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eraser crumb catcher
Assignee: Individual
•
Filing: 1978-03-13
•
Granted: 1979-05-22
•
Expires: 1998-03-13
Abstract
Abstract An eraser crumb catcher comprising an elongated trough which is removably supported on a bracket secured along an edge of a drafting table. The trough has an inboard side which extends down from the edge of the table and an outboard side which curves up and out and then back to terminate above the edge forming a cowl or deflecter to deflect the eraser crumbs brushed from the table to the trough.
Inventors
- 👤 Robert R. Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:20
CPC Classifications
B; B43; B43L; B43L19/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
An eraser crumb catcher comprising an elongated trough; a bracket to be secured to an edge of a drafting table; interengagable means on said trough and bracket for removably supporting said trough on said bracket with a surface on one of said trough and bracket forming a continuation of the upper surface of said drafting table; the inboard side of said trough when in place depending from said drafting table upper surface; and the outboard side of said trough extending above said upper surface; and an end cap removably secured to one end of said trough.
Claim 2
Dependent Claim
96 words
An eraser crumb catcher comprising an elongated trough; a bracket to be secured to an edge of a drafting table; interengagable means on said trough and bracket for removably supporting said trough on said bracket with a surface on one of said trough and bracket forming a continuation of the upper surface of said drafting table; the inboard side of said trough when in place depending from said drafting table upper surface; and the outboard side of said trough extending above said upper surface; and an end cap removably secured to one end of said trough.
Claim 3
Dependent Claim
26 words
The eraser crumb catcher defined by claim 1 wherein: said outboard side curves upwardly and rearwardly to terminate above the upper edge of said inboard side.
Claim 4
Dependent Claim
35 words
The eraser crumb catcher defined by claim 1 wherein: the inboard side of said trough comprises a horizontal ledge forming a continuation of the upper surface of said drafting table and a wall depending therefrom.
Claim 5
Dependent Claim
37 words
The eraser crumb catcher defined by claim 1 wherein: said bracket extends along a substantial length of said drafting table edge and includes: a horizontal ledge forming a continuation of the upper surface of said drafting table.
Claim 6
Dependent Claim
63 words
The eraser crumb catcher defined by claim 1 wherein: said trough is of generally semi-cylindrical cross-section with a generally planar frontwall and an arcuate back wall; and said end cap is of complementary configuration and being secured to said trough by a pin on the center of curvature of said back wall to enable said end cap to swivel to an open position.
References Cited (Backward Citations)
US2263863A
Cited
US2540685A
Cited
US2645230A
Cited
US2526576A
Cited
US2707141A
Cited
US3080141A
Cited
US3244465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |