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US3852414A Expired / Lapsed US ⏱️ 0.0 years remaining

Bone seeking technetium 99m stannous phosphate complex

Assignee: Bristol Myers Squibb Pharma Co
•
Filing: 1972-09-13
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Granted: 1974-12-03
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Expires: 1992-09-13
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Abstract

Abstract A metabolizable radioactive technetium-99m-stannous-ring phosphate complex in which at least 15 to 20% by weight, and preferably 40 to 100%, of the phosphate moiety is a ring or cyclic phosphate of molecular weight less than 300 and in which no more than 5 to 15% or 20% by weight of such phosphate moiety is a linear polyphosphate of molecular weight greater than pyrophosphate, a method of making the same, a method of using the same by in vivo intravenous administration to a mammal of the sterile-non-pyrogenic complex followed by radioassay scanning or imaging the skeletal structure, and a kit made up of a stannousphosphate complex in which at least 15 to 20% and preferably 40 to 99% of the phosphate moiety is the aforesaid ring or cyclic phosphate and in which no more than 5 to 15% or 20% by weight of such phosphate moiety is a linear polyphosphate of molecular weight greater than pyrophosphate.

Inventors

  • 👤 N Adler
  • 👤 L Gamin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 09:23
CPC Classifications
A; A61; A61K; A61K51/00; A61K51/02; A61K51/04; A61K51/0489; A61K2123/00

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 77 words
A METABOLIZABLE RADIOACTIVE BONE SEEKING COMPOSITION FOR IN VIVO CONCENTRATING 99MTC IN THE SKELETAL STRUCTURE OF MAMMALS COMPRISING A TECHNETIUM-99M-STANNOUS-PHOSPHATE COMPLEX AT LEAST 15 TO 20% BY WEIGHT OF THE PHOSPHATE MOIETY OF WHICH IS A RING PHOSPHATE HAVING THE FORMULA PNO3N-N AND A MOLECULAR WEIGHT OF LESS THAN 300, SAID PHOSPHATE MOIETY CONTAINING NO MORE THAN 25% BY WEIGHT OF LINEAR POLYPHOSPHATES OF FORMULATION PNO3+1 116 (N+2) HAVING A MOLECULAR WEIGHT GREATER THAN THAT OF PYROPHOSPHATE.
Claim 2
Dependent Claim 77 words
A METABOLIZABLE RADIOACTIVE BONE SEEKING COMPOSITION FOR IN VIVO CONCENTRATING 99MTC IN THE SKELETAL STRUCTURE OF MAMMALS COMPRISING A TECHNETIUM-99M-STANNOUS-PHOSPHATE COMPLEX AT LEAST 15 TO 20% BY WEIGHT OF THE PHOSPHATE MOIETY OF WHICH IS A RING PHOSPHATE HAVING THE FORMULA PNO3N-N AND A MOLECULAR WEIGHT OF LESS THAN 300, SAID PHOSPHATE MOIETY CONTAINING NO MORE THAN 25% BY WEIGHT OF LINEAR POLYPHOSPHATES OF FORMULATION PNO3+1 116 (N+2) HAVING A MOLECULAR WEIGHT GREATER THAN THAT OF PYROPHOSPHATE.
Claim 3
Dependent Claim 18 words
A bone seeking composition according to claim 1, said phosphate moiety being substantially free from said linear polyphosphates.
Claim 4
Dependent Claim 25 words
A metabolizable radioactive bone seeking composition according to claim 1, at least 30 to 40% by weight of said phosphate moiety being said ring phosphate.
Claim 5
Dependent Claim 30 words
A metabolizable, radioactive bone seeking composition according to claim 3, said phosphate moiety also including pyrophosphate, and at least the major portion of any remaining phosphate moiety being ortho phosphate.
Claim 6
Dependent Claim 12 words
A composition according to claim 1, where n is equal to 3.
Claim 7
Dependent Claim 19 words
A composition according to claim 1, more than 50% by weight of said phosphate moiety being said ring phosphate.
Claim 8
Dependent Claim 26 words
A composition according to claim 3, said phosPhate moiety comprising a mixture of said ring phosphate, a pyrophosphate and an orthophosphate and wherein n is 3.
Claim 9
Dependent Claim 10 words
A composition according to claim 3 wherein n is 3.
Claim 10
Dependent Claim 29 words
A composition according to claim 8, substantially the remaining phosphate moiety comprising one or more phosphates having the formula (PnO3n 1) (n 2) where n is less than 3.
Claim 11
Dependent Claim 37 words
A composition according to claim 8, substantially the remaining phosphate moiety being one or more phosphates of formula (PnO3n 1) (n 2) of which not more than 20% by weight has an n value greater than 2.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-12-02 1978-06-03 1978-12-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-12-02 1982-06-03 1982-12-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-12-02 1986-06-03 1986-12-03 $7700.00 Window Closed / Lapsed

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