US4131998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tumor growth measurement device
Assignee: COLIN PAUL SPEARS AS TRUSTEE OF COLIN PAUL SPEARS REVOCABLE TRUST
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Filing: 1977-03-09
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Granted: 1979-01-02
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Expires: 1997-03-09
Abstract
Abstract A device for measuring growth of tumors includes concentric rings on a carrier, the radial spacing of the rings from one another progressively increasing in a radially outward direction.
Inventors
- 👤 Colin P. Spears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:40
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/501; A61B5/00; A61B5/103; A61B5/107; A61B5/41; A61B5/414; A61B5/415; A61B5/418; A61B6/505; G; G01; G01B; G01B3/00; G01B3/02; G01B5/00; G01B5/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A device for measuring the projected area of a tumor and thus determining volumetric growth of the tumor, comprising, (a) a translucent sheet to be placed in registration with a tumor or representation thereof, (b) the sheet defining a plane and carrying concentric indicating circles in said plane whereby the center of the circles may be placed in registration with the central visible portion of the tumor or representation, the sheet having a surface and the circles located proximate said surface, (c) the radius R n of each indicating circle "n" being approximately 1.26 times the radius of the next smaller indicating circle, whereby an increase in tumor peripheral size from one of said circles to the next larger circle is indicative of tumor volume doubling.
Claim 2
Independent Claim
126 words
A device for measuring the projected area of a tumor and thus determining volumetric growth of the tumor, comprising, (a) a translucent sheet to be placed in registration with a tumor or representation thereof, (b) the sheet defining a plane and carrying concentric indicating circles in said plane whereby the center of the circles may be placed in registration with the central visible portion of the tumor or representation, the sheet having a surface and the circles located proximate said surface, (c) the radius R n of each indicating circle "n" being approximately 1.26 times the radius of the next smaller indicating circle, whereby an increase in tumor peripheral size from one of said circles to the next larger circle is indicative of tumor volume doubling.
Claim 3
Dependent Claim
24 words
The device of claim 1 wherein the sheet is approximately square, the sheet corners defining a circle concentric to said circles of claim 1.
Claim 4
Dependent Claim
30 words
The device of claim 1 wherein one of said circles has a radius of approximately 1 inch, and there are at least ten circles of smaller radius on the sheet.
Claim 5
Dependent Claim
17 words
The device of claim 1 wherein said sheet is substantially flat and consists of transparent plastic material.
Claim 6
Dependent Claim
10 words
The device of claim 1 wherein said sheet is translucent.
Claim 7
Dependent Claim
24 words
The device of claim 1 wherein said sheet has a generally circular outline and has a diameter of between about 4 and 11 inches.
Claim 8
Dependent Claim
12 words
The device of claim 6 wherein said diameter is about 10 inches.
Claim 9
Dependent Claim
12 words
The device of claim 1 wherein said sheet has a polygonal outline.
Claim 10
Dependent Claim
20 words
The device of claim 8 wherein the sheet is approximately square and has a side dimension of about 21/4 inches.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |