Prosecution Insights
Last updated: August 17, 2026

Alexion Pharmaceuticals Inc.

19 pending office actions • 11 art units • 18 examiners • 0 of 19 (0%) have an AI response strategy ready • 12 patents granted in the last 365 days

Portfolio Summary

19
Total Pending OAs
15
Non-Final OAs
4
Final Rejections
0
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 6 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

3
Overdue
0
Due this week
3
Due this month
0
Due in next 60 days
0
Due later

Deadline Fire Line

Every pending office action with a known statutory deadline, placed on a days-until-due axis. Dots left of Today are overdue; the further right, the more runway. Cases that share a deadline window stack vertically. 6 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (3)Due ≤ 30 days (3)

Case Difficulty Mix

Difficulty is derived from the rejection statutes on the most recent pending office action. §101-driven and multi-statute cases are graded Hard; §112-only and obviousness-type double-patenting cases are graded Easy; everything else is Medium. "Unknown" means we have not yet parsed a statute for that office action.

6
Hard (32%)
6
Medium (32%)
7
Easy (37%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 + other2 (11%)
§103 only4 (21%)
§112 only4 (21%)
Double-patenting only3 (16%)
Double-patenting + other2 (11%)
Multi-statute (no §101)4 (21%)

Industry Mix

How the docket's pending cases split across USPTO tech-center bands.

14
Life Sciences
74% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
0
Mechanical / Eng
0% of docket
5
Business / Other
26% of docket

Time-on-OA Estimate

Manual office-action response work runs about 10 hours per case. The time-saved bands below show what IP Author's prosecution pipeline typically delivers — a conservative 20% on the low end, 35% in the middle, 50% on the high end.

190 h
Manual time on pending OAs
38 h
Time saved (low, 20%)
66 h
Time saved (mid, 35%)
1.7 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
MARCSISIN, ELLEN JEAN 2 34.0% +50.2%
CONSTANTINE, CHARLES Z 1 59.0% +48.8%
ROMERO, KRISTEN WANG 1 70.7% +30.0%
BAUER, BRIANNA LEE 1
HAM, JIEUN 1 50.0% +62.5%
ALDARONDO, DASIA ALI 1 0.0% +0.0%
COFFA, SERGIO 1 61.1% +33.2%
JOHNSON, TIRONE DEREK 1
LU, CHENG 1 53.7% +66.2%
NATARAJAN, MEERA 1 62.3% +17.6%

Hard Cases (7)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 7 ordered by deadline are shown.

App #TitleExaminerDue in
18011807 DOSAGE AND ADMINISTRATION OF ANTI-C5 ANTIBODIES FOR TREATING PAROXYSMAL NOCTURNAL HEMOGLOBINURIA (PNH) IN PEDIATRIC PATIENTS BERHANE, SELAM 73d overdue
17838115 METHOD AND SYSTEM FOR IMPROVED MANAGEMENT OF GENETIC DISEASES MINCHELLA, KAITLYN L 59d overdue
17924610 CIRCULATING B CELL SUBPOPULATIONS IN INDOLENT B CELL LYMPHOMA SEITZ, ANTHONY JOSEPH 14d
18719260 METHODS FOR THE SYNTHESIS OF COMPLEMENT FACTOR D INHIBITORS AND INTERMEDIATES THEREOF ROMERO, KRISTEN WANG
18568011 DOSAGE AND ADMINISTRATION OF ANTI-C5 ANTIBODIES FOR TREATING DERMATOMYOSITIS (DM) ALDARONDO, DASIA ALI
18561469 KIDNEY ACTIVE FUSION PROTEINS AND METHODS OF TREATMENT USING THE SAME COFFA, SERGIO
18026698 DOSAGE AND ADMINISTRATION OF ANTI-C5 ANTIBODIES FOR TREATING C5-MEDIATED GLOMERULAR NEPHRITIS (GN), INCLUDING LUPUS NEPHRITIS (LN) AND/OR IGA NEPHROPATHY (IGAN) JOHNSON, TIRONE DEREK

Interview Candidates (8)

Cases in front of an examiner whose interview lift is 10 percentage points or more — i.e. interviewed cases historically resolve more favorably than non-interviewed ones. The top 8 ordered by deadline are shown.

App #TitleExaminerDue in
18219138 ANTI-C5 ANTIBODIES HAVING IMPROVED PHARMACOKINETICS NATARAJAN, MEERA 38d overdue
17923148 METHOD OF USING EXTRACELLULAR VESICLES TO DETECT COMPLEMENT ACTIVATION, AND USES THEREOF TO ASSESS AND/OR MONITOR TREATMENT OF A COMPLEMENT-MEDIATED DISEASE MARCSISIN, ELLEN JEAN 26d
18798163 METHODS FOR TREATING LYSOSOMAL ACID LIPASE DEFICIENCY IN PATIENTS CONSTANTINE, CHARLES Z
18719260 METHODS FOR THE SYNTHESIS OF COMPLEMENT FACTOR D INHIBITORS AND INTERMEDIATES THEREOF ROMERO, KRISTEN WANG
18577912 DOSAGE AND ADMINISTRATION OF ANTI-C5 ANTIBODIES FOR TREATMENT OF MYASTHENIA GRAVIS HAM, JIEUN
18561469 KIDNEY ACTIVE FUSION PROTEINS AND METHODS OF TREATMENT USING THE SAME COFFA, SERGIO
18272906 METHODS OF TREATING COMPLEMENT MEDIATED THROMBOTIC MICROANGIOPATHY USING AN ANTI-C5 ANTIBODY LU, CHENG
17952897 METHOD FOR MEASURING THE PROTEASE ACTIVITY OF C3 AND C5 CONVERTASE OF THE ALTERNATIVE COMPLEMENT PATHWAY MARCSISIN, ELLEN JEAN

Top Art Units

Art UnitApps
1675 2
1677 2
1641 2
1658 1
1642 1
1643 1
1652 1
1629 1
1674 1
1685 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18798163 METHODS FOR TREATING LYSOSOMAL ACID LIPASE DEFICIENCY IN PATIENTS CONSTANTINE, CHARLES Z DP Non-Final OA Pending Aug 08, 2024
18719260 METHODS FOR THE SYNTHESIS OF COMPLEMENT FACTOR D INHIBITORS AND INTERMEDIATES THEREOF ROMERO, KRISTEN WANG §102§103Other Non-Final OA Pending Jun 13, 2024
18719261 METHODS FOR THE SYNTHESIS OF COMPLEMENT FACTOR D INHIBITORS BAUER, BRIANNA LEE §112 Non-Final OA Pending Jun 13, 2024
18577912 DOSAGE AND ADMINISTRATION OF ANTI-C5 ANTIBODIES FOR TREATMENT OF MYASTHENIA GRAVIS HAM, JIEUN DP Non-Final OA Pending Jan 09, 2024
18568011 DOSAGE AND ADMINISTRATION OF ANTI-C5 ANTIBODIES FOR TREATING DERMATOMYOSITIS (DM) ALDARONDO, DASIA ALI DP Non-Final OA Pending Dec 07, 2023
18561469 KIDNEY ACTIVE FUSION PROTEINS AND METHODS OF TREATMENT USING THE SAME COFFA, SERGIO 1658 §102§112 Non-Final OA Pending Nov 16, 2023
18026698 DOSAGE AND ADMINISTRATION OF ANTI-C5 ANTIBODIES FOR TREATING C5-MEDIATED GLOMERULAR NEPHRITIS (GN), INCLUDING LUPUS NEPHRITIS (LN) AND/OR IGA NEPHROPATHY (IGAN) JOHNSON, TIRONE DEREK 1675 §102§103 Non-Final OA Pending Sep 26, 2023
18272906 METHODS OF TREATING COMPLEMENT MEDIATED THROMBOTIC MICROANGIOPATHY USING AN ANTI-C5 ANTIBODY LU, CHENG 1642 §102§103§112DP Non-Final OA Pending Jul 18, 2023
18219138 ANTI-C5 ANTIBODIES HAVING IMPROVED PHARMACOKINETICS NATARAJAN, MEERA 1643 §103 Final Rejection 38d overdue Pending Jul 07, 2023
18032973 METHOD OF CONTROLLING TOTAL SIALIC ACID CONTENT (TSAC) DURING MANUFACTURING OF ALKALINE PHOSPHATASE RAMIREZ, DELIA M 1652 §112DP Final Rejection Pending Apr 20, 2023
18011807 DOSAGE AND ADMINISTRATION OF ANTI-C5 ANTIBODIES FOR TREATING PAROXYSMAL NOCTURNAL HEMOGLOBINURIA (PNH) IN PEDIATRIC PATIENTS BERHANE, SELAM 1675 §102§112Other Non-Final OA 73d overdue Pending Dec 20, 2022
17924610 CIRCULATING B CELL SUBPOPULATIONS IN INDOLENT B CELL LYMPHOMA SEITZ, ANTHONY JOSEPH 1629 §101§103§112Other Non-Final OA 14d Pending Nov 10, 2022
17923148 METHOD OF USING EXTRACELLULAR VESICLES TO DETECT COMPLEMENT ACTIVATION, AND USES THEREOF TO ASSESS AND/OR MONITOR TREATMENT OF A COMPLEMENT-MEDIATED DISEASE MARCSISIN, ELLEN JEAN 1677 §112 Non-Final OA 26d Pending Nov 03, 2022
17952897 METHOD FOR MEASURING THE PROTEASE ACTIVITY OF C3 AND C5 CONVERTASE OF THE ALTERNATIVE COMPLEMENT PATHWAY MARCSISIN, ELLEN JEAN 1677 §103 Final Rejection Pending Sep 26, 2022
17849793 ANTI-C5A ANTIBODIES HOWARD, ZACHARY C 1674 §112Other Non-Final OA Pending Jun 27, 2022
17838115 METHOD AND SYSTEM FOR IMPROVED MANAGEMENT OF GENETIC DISEASES MINCHELLA, KAITLYN L 1685 §101§103§112Other Final Rejection 59d overdue Pending Jun 10, 2022
17738131 HIGH CONCENTRATION ANTI-C5 ANTIBODY FORMULATIONS KIM, YUNSOO 1641 §112Other Non-Final OA 19d Pending May 06, 2022
17612368 METHODS OF TREATING VITILIGO USING AN ANTI-C5 ANTIBODY TAYLOR, LIA ELAN 1641 §103Other Non-Final OA Pending Nov 18, 2021
17421511 METHODS FOR PREPARING AMMONIUM TETRATHIOMOLYBDATE SAWYER, JENNIFER C 1691 §103 Non-Final OA Pending Jul 08, 2021

Managing Alexion Pharmaceuticals Inc.'s Patent Portfolio?

IP Author helps IP teams respond to office actions faster with AI-generated responses, examiner analytics, and prosecution intelligence.

Start Free Trial

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month